The average user is going to open Safari or Edge and go to Google or YouTube. They'll see the "this page runs better in Chrome" popup and install Chrome. The installer asks to make it your default browser, so they do.
The idea that you can install an addon to the browser isn't even in their toolbox. They aren't aware of the anti-competitive nature of Google. To them, a browser is just the thing their OS exists to run for them.
My grandmother uses the Google app to browse the web on her phone. Not Chrome. Not safari. the Google Search app.
Because every single time she does a search, google tells her to install the app.
And I have a few friends that either uninstalled Adblock. Or stopped watching YouTube on PC in response to this new Adblock crackdown. All of them use chrome.
You're right, but you're forgetting, Chrome needs technically inclined users. Yes there's always people without enough awareness to be satisfied with the walled garden, but Firefox used to be popular because it was user, and importantly power user friendly.
Something will usurp that thrown, the power users will switch and then so will everybody else
Even a 5% dip will end it.
And technically inclined users are the ones being asked to configure computers for their families etc.
Bit by bit, maybe Google will get the message.