But the UTXOs would still have a history of coinjoin, with the current mixing systems we have. I mean if you're never going to hit KYC it wouldn't matter but if you are going to go KYC, you might need to do a Wasabi cucked Coin join to prove your coins aren't terror tokens lol and then you could get access to that liquidity.
To me the better option would be to take a UTXO and fund a LN channel instead and spend from there or submarine swap if you never need to touch KYC onramps