Question about Non-KYC Bitcoin

Let's say I buy some non-kyc bitcoin off of Bisq. How do I know that it is non-kyc? Couldn't someone in theory just purchase KYC bitcoin and then sell it on Bisq? Does this really make it non-kyc because the exchange doesn't have my info? Wouldn't the gov't just be able to go after the person that bought it on the kyc exchange then trace it back to me?

If that is the case, couldn't I just have a family member buy me bitcoin then transfer it to me and then poof it's non-kyc? I've been really wanting to get into non-kyc bitcoin but the above questions keep popping up in my head. Can anyone explain?

EDIT: I feel like there is a misunderstanding of what I'm asking. I'm really talking more about the properties of a non-kyc vs kyc coin. Based on the sassy replies it would seem like there is no difference in the properties between the two? The only difference is that a non-kyc has no paper trail from a CEX that I bought it? So then I could just have my brother buy it from a KYC exchange, send it to me, and now it's non-kyc because I didn't buy it from the CEX?