> All platforms become bad as soon as you allow average Joe speak his mind.

Hard disagree on that one. Average Joe is perfectly fine.

But I strongly agree on professional platforms allowing users to create content being an incredibly bad idea.

A possibility turns into an obligation for success real quick. I have just about 0 interest in creating 10 posts per day to game some algorithm into promoting me. And neither would I like hiring someone who spends 80% of his time awake trying to game some algorithm into enlongating his job title.