If you want to help people on social media, don't ask SM companies to wield their power more wisely - take away their power.
Consider a reg that requires platforms to stand up interoperable gateways between services (as the EU's 2024 DMA does), and that guarantees your right (under data protection laws like the GDPR and CCPA) to have legacy SM firms point the people you communicate with to a new platform after your departure.