Meta wants as many creators and developers building Metaverse products as possible, because more products mean more advertising opportunities and potentially small marketplace fees, so it can keep fees very low to encourage creation.
This does not mean that Slack doesn’t help some or even most employees. But it holds back the most productive among us and prevents them from coming up with ideas that would make all their colleagues redundant.
We can do a similar reductio ad absurdum for a micropayments-based web. Imagine if everything you do online required you to decide whether to make a tiny payment. Send an email? Pay a few cents. Read one more paragraph of an article? Pay a few cents. And so on. It would be an utter nightmare.