Perhaps it would've been better for Twitter to support free speech then and they'd (the Parler users in question) have remained a fringe voice completely overwhelmed by opposition on a mainstream platform.

Even then, the main problem I see driving all of this is the lack of competition, so I fully support building "echo chambers" if that means competition for platforms like Twitter that are actively working to create echo chambers that they control.

Edit: clarity

That's a caricature. The actual principle is "equal justice before the law" (there are variations). Justice is an important part of the principle since otherwise "The law, in its majestic equality, forbids rich and poor alike to sleep under bridges, to beg in the streets, and to steal loaves of bread". Not to mention such evils as selective enforcement and prosecutorial discretion.

Few people these days would insist that equality of outcomes is a legitimate goal, though the extent to which disparity of outcomes is treated as a "code smell" at least potentially indicating a societal problem worth examining does vary fairly predictably across the US political spectrum. The appetite for instituting solutions when a systemic problem is demonstrably found also varies fairly predictably.