Peer review has problems but that it nothing when compared to things like pre-print servers where it is mostly unreviewed and lay readers are consuming med research that is highly misleading due to spin.
I had to look up pre-print servers. It's easy to imagine the danger of having unreviewed studies/research exposed to the public like this.
One reason I was asking about the usage of AI in your field is because I wanted to compare it to the effect on mine (software engineering). Chat bots like ChatGPT and Perplexity are of great assistance with tasks like research and code generation. If I need to write a simple bash script or similar (i.e. using a language that I use infrequently), asking a chat bot to whip that up is many times faster than me having to go dig up a reference on the constructs of the language and piece something together. Similarly, if I'm researching a specific aspect of a framework or library unfamiliar to me, I would, in pre-AI days, have to Google, comb through the search results for tidbits relevant to my topic, eliminate all the duplicate information, then collate and aggregate everything I've learned into something useful. For an extra degree of difficulty, maybe I'm only curious as to how this particular framework interacts with features of another library, which adds a lot of cruft to my search results. Now, I can ask Perplexity a specific question, and it will under the hood duplicate my efforts and present me in seconds what might have taken me hours, or even days, before.
In software engineering, I think the greatest threat to existing jobs is to junior roles. Complex design or fact/solution checking tasks, the province of more senior developers, are still safe. It's the simple tasks, generally carried out by more junior developers, which are easily replaceable by AI. As well, the very considerable time savings that AI affords to senior developers (as in my example above) means that senior developers can now accomplish a lot more in a given time allotment. Those two facts together has definitely had an effect on the size of the job pool for junior developers. Obviously, you still need juniors! The seniors will one day retire. But the barrier to entry is higher; fewer positions available, and those are now restricted to those with the talent and drive to reach senior levels.