Bitcoin should eliminate any kind of third-party involvement.
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What I mean by getting payment in different payment methods is that if there are any Bitcoin ATMs, utilize them. Almost every country has some kind of payment method like Cashapp, Perfect Money or others. We have Bkash, Nagad and many more systems where we can receive our payment.
So, you're just using some other third parties instead of these third parties!
Trusting Perfect money with your funds over a bank sounds far more risky to me, who are you going to complain with if they close your account and stop you from getting your money out?
I presented them as an example only. You don't have to use Perfectmoney. Most of the countries have payment methods like that. When you are trading in the same country, it's like the other party may have the same payment method available. For example, Paytm is popular in India. Paytm never asks where the money came from. I live in Bangladesh, and I use payment methods like Bkash and Nagad. Those payment methods never ask where the money comes from. What is the source of this money? When it comes to banks, they ask for a photocopy of an ID card when someone deposits money into someone else account. Banks ask where the money came from to the account holder. Bank asks the source of the money when people deposit their own money in their own account.
So my point is if we cannot entirely eliminate the involvement of the third parties, at least use the safest methods. Banks are the most used and most ridiculous payment methods on the earth. If you can pay with Bitcoin for products, that's good. If you want to cash your Bitcoin, use the safest method available. Banks are the right hands of the government. They transfer all the details to the authorities.