Things like Effective Altruism and looking at existential risk are hardly drawing a substantial amount of attention right now; they should be, but they could get ten times the attention and funding and still only have a miniscule fraction of the people and funding going towards more popular causes.
And the set of people who think climate change isn't an important problem has almost no overlap with anyone thinking about existential risk. At most, I've seen a very small number of people suggesting that there are other high-risk issues that also deserve attention and aren't getting it.