Years ago we had the creation-evolution debate with FR posters-trolls hitting the Creationist side insisting Evolution was the way absolute truth.
When it comes to COVID the same rigid thinking using “Science” when it comes to vaccination.
Its funny to see the promoters of Evolution the followers of science contradicting Evolution by being rigid and fixed when it comes to COVID and Vaccines.
The root of irrationality is discarding science, or choosing some portion of science and ignoring the rest. What you are talking about is claims of "truth". Any claim of truth is by definition unscientific.
Yes, vaccines generally don't work well against RNA viruses. The scientific question is whether the current vaccines are better than nothing or worse than nothing. There are good arguments for both, but mostly what I read is bad arguments (ill-founded speculative innuendo, or based on weak data like the low numbers in the vaccine trials).