That's your personal opinion, but you're not helping the discourse by answering 'why' it isn't required or even help.
Let's step outside of the box for a moment. If I'm in some other country and I don't have easy access to a credit card and I want to build out the next cool idea, how do I get access to scalable compute?
P2P transactions is one way. There are crypto ATMs all over too.
I have a lot of experience in the Vietnam market. Most people there don't have credit cards, but they do have bank accounts and can easily buy crypto from a variety of sites... binance, remitano, localbitcoins, bitcoinvn, etc...
Once you get outside the US, a lot of things open up quite a bit. Especially in developing nations.
Because you can use a central authority (ie, company, any organization really). "Distributed computing" doesn't mean no central authority. With a central authority it's easier to build and has lower transaction costs.
If someone has a bank account, they can get paid, in your scheme. They don't need a credit card.
Then re-state it clearly and I'll do my best. I thought I was answering "why" crypto doesn't help decentralized computing.
The other thing (no cc) isn't related to decentralized computing. It's a payments system problem. You can make a case that crypto is helping, but conflating it with decentralized computing just muddies the waters.