Google has a strong position in search, and pushes Chrome every time you hit their top level page. Also Chrome is the default on Android, yeah? I don't think you can extrapolate from that market share to determine how likely people are to change browsers.
The parent's market share claim is for desktop OSes, where Android is irrelevant.
It's still far easier to not install chrome than it is to install it: downloading a thing, running the downloaded thing, click through all the dialogs, ignore all of Windows's nags to stick with Edge (which is probably a greater abuse of platform control than advertising on the search page), ...
I think a lot of companies switched to pushing Chrome via device management during the later IE days and never switched back. Presumably that's a decent chunk of market
