If websites implement this, it will effectively make building a web search engine impossible for new entrants. The current players can whitelist/attest their own clients while categorizing every other scraping clients as bots.
If not for other reasons, I can't see how Google a search company can be allowed to push something that can kill competition using its market dominance in other areas like browsers.
https://github.com/RupertBenWiser/Web-Environment-Integrity/...
I have no way of knowing if they are honest or not and even if they are there's no guarantee that they won't change their mind later.I cannot take the risk and be on guard forever.
I would much prefer not to allow them into the house in the first place.
Google should not have brought this proposal but they did.So, I will not place my trust in Google doing the right thing irrespective of their claims and promises.