At least to your second point, in the video he explains that there are ways to seed clouds for cooling purposes without any major side effects, and the experiment hes talking about is that this shows it can be done on a large scale. Whether it would make us complacent on getting CO2 out of the air, though, it might but at least it would be the start of a solution.

become complacent about solving the primary problems

We have been complacent about solving the primary problems for decades. At this point we should be doing all we can, and if a way to combat the symptoms gives us more time to finally get our shit together and do something useful before everyone turns into doomers giving up because it's too late anyway then I think that's a good thing.

You think we can solve primary problems? Cause all I see is us driving off a cliff. If we aren't willing to hit the breaks I'll settle for turning the car into a bush

OPs link is Hank’s “blog post” about that video, he links to it in the article.

I'm not sure that spreading salt is a good idea when you consider that salt kills life when you spread it on land.

Like the one daddy puts in his drink! …and then he gets mad

Relevant xkcd

Solving the problem once and for all!

Came here to say this. Highly recommended book.

Correct

Thus solving the problem once and for all!

Randall Munroe would like to have a word with you:

https://what-if.xkcd.com/47/

Indeed. There are people who wail and lament about how we've passed a "tipping point" and the climate is doomed to catastrophic warming no matter how much our emissions are reduced at this point, and then when you bring up the possibility of studying geoengineering they snap back at you with a "but not like that" reflex.

Frankly, I think there are environmentalists who like the notion of inescapable doom. It gives them an "I told you so" feeling of victory, perhaps, or absolves them of any further effort. Or they've decided humanity is evil and deserves to be "punished." I don't know, it's just so wearying trying to deal with that reaction.

At the end of the day, when major governments are faced with the choice of collapsing under a wave of migrants and famine and taking a stab at spraying some aerosols into the upper atmosphere as a hail Mary, they're going to try the thing that isn't guaranteed disaster. Would be nice if we could do some studying of it first.

Me too, and quickly.

If certain scientists believe they can turn such an inhospitable planet as mars into a liveable environment....why can't we fix up earth?