Porque no los dos?

There is no functional difference between them scraping you systematically and them coming to you on behalf of user. They're coming to scrape you either way, being asked by someone is just going to make them do it in a smarter fashion.

Also, if you're not using Gemini, damned if Google.com doesn't search you with it anyway. They want these AIs trained bad, sooner or later almost all searching will be done through AI. There will eventually be no option.

You are correct that blocking all AI calls well eventually make your search results not work.

So if you want organic traffic, you have to allow ai scraping eventually. You're just going to get diminishing returns until a point.