Given this info, the natural next question is “who is doing the harm?”
The answer is “AI companies”. Most people would now view the situation as having a lot to do with AI companies.
Bing used to do the same thing. (It might still do it, I just haven't heard about it in a while.)
Surely has very little to do with "intelligence".
And yet they are not. So what does that tell you?
What these crawlers are doing is akin to DDoS attacks.
You could also get CloudFlare, or some other CDN, but depending on your size that might not be within your budget. I don't get why the rest of the internet should subsidize these AI companies. They're not profitable and live of venture capital and increase the operation costs of everyone else.