When authorities will begin blocking exchanges and mining pools web sites access, you will see that what he/she says will began to make a lot of sense to you too and all the believers.
I believe it, I just don't see how this effects privacy coins, it's not as if authoritative entities bearing down on crypto was not forseen, that is the whole point of privacy coins, they will adapt with ease no matter how strong the pressure..It seems BitTorrent and TOR still run strong despite endless attempts to end them.
Centralized exchanges are temporary, in the near future decentralized exchanges will be the norm. P2P Mining has existed for some time, mining pools are not necessary, they are just convenient.