Fair, but actually you'd surely want your choice of those three, right?
And what's being discussed here is what the better implementation of option 3 is.
My point is that if you're going with one of the possible implementations of option 3, then 22GB per browser is objectively a lot better than 22GB per website.
The options are:
1. 22GB per website
2. 22GB per browser
3. 0GB / No AI capabilities
By having this in Chrome they are simply ensuring that option 2 replaces option 1. You still have option 3.