edit:
As some have pointed out, KYC is for buying bitcoin, not for making purchases with bitcoin, this is a fair point, but I think it's still noteworthy to recognize that most people will endure that KYC process to acquire bitcoins since the alternative is something like localbitcoins (scam prone and considerable effort for a newbie). Additionally, it's still true that for most people, the practical utility of bitcoin is a function of the services that these 3rd party companies are willing/able to provide, if some of these big players went bankrupt, suffered from long term DDOS, encounter legal problems or have their coins stolen by hackers, suddenly your average consumer has lost practical use of their bitcoins.