This might be true in a true, free market without monopolistic collusion and the abandonment of antitrust regulation and enforcement in the US.
In many cases people don’t switch to something else because there isn’t an alternative. Or because they don’t know how to change the defaults that come installed on their computer. Or they get a big scary warning if they figure it out and try.
I would have a hard time believing anyone who said Google was competing fairly and not juicing their numbers with Gemini. Like with search and ads, they have a lot of vested interest in profits and little regard for much else. There’s no reason to. Almost all safeguards on corporate behaviour have been taken off in the last bunch of years.
Google jumped at renaming Lake Ontario.
Of course they’re going to shove AI mode as the default on search and claim every user loves it.