Whether you like it or not, when you talk about a mixing service, you automatically mean it as being used to move money obtained illegally, in order to lose track of it. Therefore, even if our use is not for this purpose, this is the tag that these services have before the authorities.
The Dutch authorities disagree with you:
Fun fact: Chain analysis bots have a separate category for "mixer" which they automatically classify as high-risk because they would otherwise have to, er,
break CoinJoin, which we know they can't do. This is in addition to the other categories they have like gambling (??), sanctions evasion, government action.
I saw a stat on one homepage saying one of four wallets is suspicious.
If everyone were to use a mixer, it would break the model and make it 100% of funds being suspicious (therefore they cannot be suspicious) and it would force them to actually nab the criminals before they send them to a mixer.