The White House cautiously endorsed the idea of studying how to block sunlight from hitting Earth’s surface as a way to limit global warming in a congressionally mandated report that could help bring efforts once confined to science fiction into the realm of legitimate debate.
You say “just fixing the things causing the problems” as if that’s something that’s easy, or even doable. It’s not.
I really don’t get why people are so opposed to simply studying options like this. If you’re really convinced that the world is doomed anyway, why does it bother you whether studies like this are done?