This isn't even an issue, you have made that problem up. I host a blog and there are some AI bots coming around. Big deal. Most of them do respect a robots.txt. Some don't. Not a big deal as well.

In contrast trying to change the infrastructure of the net, which previously was quite resistant to censorship is quite a big deal.

This sounds exactly like a crazy preacher warning about the dangers of rock music. A completely made up threat. And we need the protection of god against these evil AI bots.

Wow, a bot that disrespected a robots.txt. How can the internet survive...

Also, OpenAI already has the data. You want to ensure they will never get competitors by putting up barriers now. It makes no sense...