Getting someone to onboard to a new platform is ultimately a sales job. Selling is about telling people who they want to be, not who they are.

A social media platform advertised as a politics-first/free-speech platform is the social media equivalent of a beer ad featuring a divorced balding man at last call in a dingy basement bar. No one aspires to bicker about politics with strangers on the internet, even though in reality that's the engagement that pays the bills.