It’s not always so easy to walk away from an entire platform. People’s entire livelihoods could be based around Google.
I don’t see any issue with Google owning some of this responsibility.
You cannot expect Google to act against its own self-interest only because you ask nicely. You have to stop giving them the market power to do it.
I don’t expect Google to act against its own will, but they should.
If you don’t want to stop using Chrome, then your alternative is to buy a controlling share of Alphabet and appoint a Board that forgoes advertising revenue in exchange for being nice to adblock users.