I want the right to deplatform people for any reason. It my money I'm using to run my site and I should get to choose who uses it for what, with any rationale, or no rationale.

If society feels there's some gain to be had by restricting this, then let's legislate (because the platforms already ban people to maximize their profit, they're not giving that up willingly). Though, honestly, that's such a minefield I have trouble imagining the form effective legislation would take.