That's a nice fantasy you're having. What magical power is supposed to ensure that whole "equally reach weighted" part? Because I'll lay 10:1 odds that guaranteeing that would be much more oppressive than a one-time temporary ban on a Nazi app.
The DOJ handles antitrust. Its not fantasy for anyone thats looks to history, you might remember when telecom was broken up. That was reach that was then fragmented. This issue is larger than your individual assessment of what Parler was and regardless of what "side" you are on politically.
You can't geo-divide an app store...Also the way DOJ broke up Ma Bell is largely viewed as a failure given the amount of company consolidation that occurred in the years following
Who said we are going to geo-divide app stores? The failure was the follow up effort of the DOJ for not blocking mergers thereafter, not the initial break-up.