Yeah I'm sure that China is investing billions and betting their future air force and navy strategy on "joke technology". The Chinese engineers working on the J-35, J-36 and J-50 just got brainwashed by NATO propaganda. China should just build a bunch of Flankers instead, so they can end up like the Russian Air Force that can't penetrate Ukrainian controlled airspace 3 years into a war and just lob glide bombs ad infinitum, while Israel can penetrate deeply into Iran on their third attack. Whatever.
As for jamming, that's exactly where stealth/low observability being a force multipler comes in. If your radar cross section is much lower, you need a lot less energy to jam and effectively mask your radar signature, and the jamming is effective over exponentially longer distances. Yes the effects of stealth technology are exaggerated by propaganda and movies, and of course it's possible to shoot down stealth aircraft, but it's still effective.