Surely, when it comes to cryptocurrency trading, everything is different, everything is perceived differently, including the attitude towards matters of self-custody of your own keys, undergoing KYC procedures, privacy, anonymity, and security. It's all about compromises and sacrifices: you have to make them if you are to choose between the casual usage of cryptocurrency in your daily life and the professional usage of cryptocurrency in trading, investing, business... You can't stay anonymous while living off trading, you can't avoid KYC and other similar procedures, you can't retain privacy when filling out your tax form, you have to hand over your coins to access liquidity. However, those who are not traders can and probably should avoid taking risks of dealing with centralized entities.
Of course, all these admonitions about not your keys - not your coins, avoid KYC, avoid centralized exchanges, and in general any custodial services, they are more suitable for crypto investors. After all, why would an investor who holds cryptocurrency on his cold wallet need all this deanonymization and third party participation. But in trading, alas, you can't do without it. If you want to be a trader, get ready for KYC, centralization, and dependence on a third party. If you don't want to be a trader, be an investor. If I started my way in cryptocurrency now without trading, of course I wouldn't need all this centralization and I wouldn't pass KYC anywhere.