And sometimes it is unexpectedly pricey to use a centralized exchange, as it takes arbitrary commissions like "20,000 sat for withdrawal".
There are a lot of exchanges that ask for withdrawals of less than 20,000 Satoshi. In addition, it is strange for me that you pay attention to 20,000 satoshi when the same mixtum asks for 4% -5% + 0.0007 BTC. Such a commission loses 99% of centralized exchanges that can withdraw bitcoin without KYC to my wallet.
And that implies the user does have an account already, otherwise it takes more time to create an account, deposit and withdraw than do it a la mixer.
This is a far-fetched problem, registration on exchanges very often requires mail, password and 2FA, they are already ready for full-fledged work. There are some exchanges without KYC, where even mail is not needed, and they are already ready to go.
That's a concern only if you're using a centralized exchange beyond mixing. People who don't use them, don't buy the taint thing.
This is a concern for any interaction with any service that has enabled AML validation. Someone decided that there are bitcoins that can be changed. and which can be rejected. Mixers are just among those services, after which bitcoins become some kind of outcast, which many refuse to accept as payment. The adoption we deserve. I have bitcoins, but they don't accept them from me, because these bitcoins do not pass some kind of fucking verification from a third party. All my life I dreamed of such crypto freedom.
How confident are you that money coming from an exchange will be deemed as "clean" by every other exchange? I wouldn't be so sure that an exchange can "come to the rescue" and make the bitcoins acceptable by everywhere, because the manner which chain analysis companies deem them as "clean" / "taint" is entirely subjective and can differentiate across their industry.
In the 7 years that I have made crypto transactions, I have not yet seen a single case where an exchange blocked my funds because they were from another exchange. I would like to get acquainted with at least a few similar cases, but centralized exchanges themselves do not fall under the label of high-risk projects. Bitcoins from mixers, gambling services, casinos and HYIPs fall under this category.