Google could do this if they wanted very very easily but they wouldn’t make any money because as you know they sell advertising, for things they don’t provide.
The problem isn't the Browser it is the other services it has that makes it a monopoly.
Don't let, "Oh we sell off our loss leader so we are not a monopoly." fool you. It has YouTube, office solutions and even every other software under the sun.
Without Chrome being managed or maintain it becomes vulnerable exposing customers to viruses or attacks. It is a service because it stores passwords and manages bookmarks in a secure location for Google products. It is ingrained.
To me this sound like Edge wants to be king, but oh wait Edge is also part of a monopoly. So should not Microsoft experience this too?
Monopolistic practices are not necessarily monopolies, but rather require regulation to encourage fairness.
But to come back to the original point I was making, is that it’s really not akin to a bakery window. If I wanted to allow the metaphor to be further tortured I’d allow “Sears” or something.
But it’s more than that, as Google’s business model is largely parasitic to what users would be doing anyway.