You're right, but I don't see Facebook (or other Meta properties) approaching that level. Arguably, Whatsapp is the most successful in that area, but largely because they haven't done anything to further ruin their reputation. If/when Meta decides that Whatsapp is going to be their new focus and potential cash cow, they'll try and shove more monetization into that platform and the cycle of user migration will repeat.
Convenience and familiarity trumps other issues, even massive issues like privacy etc. You might be over estimating public's interest in giving their money only to honest, decent businesses - public gives their money to whoever entertains them cheaply and caters to their laziness.
Nothing is going to change, unless we all vote with our wallets. But we have already voted, we knowingly support monster companies like Amazon.