This happened before "AI" too. When all it takes is clicking an "apply now" button on LinkedIn some desperate people will spam any job they see.
Magicly, the spamming stopped, and we only had applications from good genuine candidates with a real interest in the role.
The job of any technology (like email and "apply now" buttons) is to make life easier and better. If it doesn't do that, then don't use it!
I recall seeing one where you had to send a specific payload to an https endpoint to apply (or it might have been an automated screen immediately after the application was submitted). Forcing potential candidates to briefly open the curl manpage seemed like a similarly elegant solution to me. I doubt it works as well in the era of LLMs though.