I didn't open your link but I agree we need more blockchain SM as substitute for Facebook, Youtube and Instagram. Might take some time for them to take off even they are just as good and the big companies don't try to kill them though, it'll be hard to wean off most people from the apps they are used to. As I see now, most people asking for alternatives are those people that are being censored by these tech giants. The majority don't have this problem - yet - so just drift along.
Libra might control and they should be stopped. A monetary system should not be one which is controlled by Libra. But the monetary system being protected right now is the total opposite of 'available to all' 'and without any governing body.'
I think their issue is that they are afraid that the current censorship problem we see with social media would be also applied to Libra being that FB owns it. I believe a few month's ago there was a issue with a bank freezing the accounts of vocal right-wingers so it wouldn't be far-fetched that the same can happen here.
Of course fiat is no better but if you have your physical money with you there's not a lot of ways they can make you part with it.
No one is going to use this, lets stop trying to act like people would ever use facebook, instagram, etc on the blockchain unless it had a great UI. Which it probably wouldn't.
Most people want this because of censorship, but at a certain point in growth for any community there's going to be censorship to please the advertisers -- as you do have to pay for server costs, design, and so on and so forth.
So, yeah.