That's absolutely what will happen, there's no evidence of otherwise.
But this is all beside the point. The argument is, if there existed a app store that was as large as Play Store / iOS store, it would have similar moderation issues. The old headline implies that these companies aren't trying to moderate, rather than realizing that moderating content at scale is a REALLY hard problem no one has solved.
No Google/Youtube, not Apple, not Amazon/Twitch, not Facebook, not Twitter, not Microsoft, no one.