And they'll keep updating contracts to sell ads for a defunct site? Seems doubtful. Past experience shows that the site is unlikely to stay up for the long haul.
Why would the Chrome engine being dominant be all that problematic? And as a user, I'd like to make that choice for myself.
Also, Safari wouldn't vanish just because you'd be able to use a different browser engine. I strongly disagree with your "scary" (not scary) scenario: Only a small percentage of users is ever going to change defaults.
Seems there's no material increase in organized shoplifting, but that doesn't change the claims about regular shoplifting? Seems like you're not actually disputing anything.