There's IIRC a single-digit number of mosquito species carrying malaria and a slightly higher number of mosquito species targeting humans - as compared to hundreds of species of mosquito. Kill the carriers off and they just get replaced by some other specie of mosquito.

Lets face it, if the same Malaria mortality rate happened in the West, we wouldn't (and historically didn't) wait for vaccines - we'd pave over an entire ecosystem if we had to. We'd do the same even if we had the same death rate as the group that got vaccinated.

Well bats certainly haven’t caused us any major global health problems recently...

While the bat origin of Covid 19 is plausible, it hasn't been conclusively demonstrated. The gain of function lab leak is just as plausible, and equally unproven -- due to the Chinese dictatorship's suspicious lack of transparency and cooperation.

Lab escape is still bat origin, just potentially with a human assist (or human mistake with an unaltered virus.)

Sure, and they’re a large viral reservoir, but I’d hope we don’t think that’s a good reason to eradicate them. They don’t typically come into our homes the way mosquitos do; we go to theirs.