This is somewhat reddit analysis since in the scenario of US-China conflict starting with a Chinese kinetic action or blockade of Taiwan any US initiated disruption or blockade of ship routes from and towards China serious enough to hurt China enough to "back off" will have already completely collapsed the economies and even societies of Japan, Worst Korea and Phillipines (allies whose assistance let alone normal function the US counts on to be able to do any kind of successull defense of Taiwan), those of most of the "non-aligned" SEA countries and of course Taiwan. Not in a "recession" or "inflation" sense. If the US is able to mount any such successfull sea route choking to have China in crisis within idk 1 month ,most of the countries i mentioned will be imploding within 1-2 weeks. There is no way of doing one without doing the other and at that point you have lost both Taiwan and the entire region.
There is a reason practicaly no US military think tank, war game or DoD analysis seriously considers SEA sea trade route blockading and disruption a strategy US is remotely likely to try. If it was a viable approach to "win the engagement" both sides would know it and it wouldnt be any kind of a secret, you would see it being seriously discussed and analyses by credible sources and people, not on YT videos and r/Noncredible defense
Of course China wants to expand its inland routes and of course it wants to maximize its degree self sufficiency in energy , calories etc. In part because of course sea routes will be disrupted in any Taiwan related US-China conflict even if the US takes no action on that front. But it being used as a strategy by the US and being credibly able to hurt China both enough and quickly enough to cause a defeat before other factors do and without it fucking up every single ally and non ally in the erea first to a degree that will mean the US loses the region anyways
If anything Ansarallah forcing the last line of missile and air defence used by US ships and managing at least a near hit or scare on USS Eisenhower with the 2nd tier Iranian missiles shows that in any hot conflict in SCS there would be 4 US carriers and 15 Destroyers in the bottom of the ocean by the time the first Chinese person goes hungry or without heating due to US initiated sea route disruption
Eh i dont think thats an excuse tbh. Bunch of SEA nations, especially with large muslim minorities or majorities have at the very least taken a stong and loud pro-palestinian stance, even if its surface level and trade continues to go as is. Yeah they got some pressure from the west but nothing too dangerous. Vietnam could afford to have a better position on the issue than it does, comfortably. Cutting back from their way to extensive military cooparation and trade with Israel for example that even in nominal figures is one of the most extensive globably. Lib countries have done so , even performatively.
The real issue is ,and it often goes unnoticed, that Vietnam got into the capitalist,pro west and liberal brainrot comfortably more so than China during their oppening up, and hasnt really had a "course correction" like the Xi era has been for China. Of course they had huge issues to content and very hostile conditions after the Vietnam war but the current situation is what it is. Its seems weird but at the street level as well as in various official circles there is less pronounced distaste towards the western led neoliberal world order then in most of their non socialist neighbours. Free market good, foreign investment good , bamboo diplomacy good has been drilled a little to deep in most political and public life even if it started as pragmatic and controled choices by the communist party and it basicaly has put dogmatic blinders of the wrong ideology in a lot of their decision making . China had and still has this problem as well. Even the changes under Xi and the new cold war still havent managed to shake it off in a satisfactory degree. Regarding Israel there is a prominent view in liberal and west friendly market loving circles, that arent an unimportant force in Vietnamese politics and party, that its a enterprenaur nation that knows to get rich and technologicaly advanced and strong despite their size so there is a dumbass soft-admiration towards it
To end on a positive note tho, last i heard there has been an ongoing power stuggle inside the party and the less american/liberal friendly wing has been coming out on top and cleaning house. It wont cause some noticable shift, at least not one that they wanna show since America already is buying that Vietnam is an ally or whatever but it seems like there wont be a rightwing, neoliberal slide for the next decade at least there and there probably be more China intergration