> Science is supposed to be immune to these kind of bullshit

You have misplaced confidence in the scientific method. It was never immune to corruption, either by those deliberately manipulating it for their personal gain, or simply due to ignorance and bad methodology. We have examples of both throughout history. In either case, peer review is not infallible.

The new problem introduced by modern AI tools is that they drastically lower the skill requirement for anyone remotely capable in the field to generate data that appears correct on the surface, with relatively little effort and very quickly, while errors can only be discovered by actual experts in the field investing considerable amounts of time and resources. In some fields like programming the required resources to review code are relatively minor, but in fields like biology this (from what I've read) is much more difficult and expensive.

But, yes, science is being flooded with (m|d)isinformation, just like all our other media channels.