I'm not saying you are wrong by any mens, but I have not experienced this personally. It might be because I have never used centralized exchanges which require KYC or any service using payment processors such as BitPay which also require KYC or perform blockchain analysis in the first place. Certainly the places I spend bitcoin in person locally all tend to accept it directly and without a third party payment processor.
I would love to use the services that provide me with a bitcoin address so that I can pay them bitcoins in exchange for their services, but various businesses are constantly expanding, and therefore it is beneficial for them to shift all this payment red tape to third-party services that will keep records for them, create wallets, provide checks, etc. This is inevitable for large services and stores, it is easier for them, and the privacy of users is of little concern to them.
If everyone moved from centralized exchanges to Bisq, for example, then the most common complaint Bisq gets about liquidity would simply cease to exist.
I heard something similar about DEX, if everyone switched to DEXs, then CEX would cease to exist. Of course, this cannot happen, because DEX is not an absolute analogue of CEX, everything is different there. A few examples:
- CEX allows you to convert cryptocurrency and make cross-chain off-chain exchanges, so we save a lot on commissions. In DEXs, each action equals 1 transaction, which is why everything is so expensive on DEXs.
- CEX allows you to trade intraday and make various margin operations in trading, DEXs, for the most part, are very poorly suited for day trading.
- CEX is always a multi-platform service, DEXs most often work within 1 chain on which they are built, other operations require blockchain switching or the use of bridges. On CEX, I can make a cross-chain exchange and withdraw cryptocurrency to my wallet for 10 cents; on DEX, the exact same operation can cost $50-70.
- CEX is not subject to such influences as price slippage, and on the DEX this is an extremely common phenomenon.
We cannot talk about a complete replacement of CEX with DEX, because DEX does not have all the functionality that CEX has. And if there is nothing there that is on CEX, then why should we all go there, just because there is decentralization and privacy? Who in the crypto world is really interested in these things? A maximum of a small layer of crypto users, the so-called maximalists and cyberpunks, the rest do not care much about these things.