smart people who would use a mining pool to launder. would not pre-broadcast a tx to the entire network first. they would pushtx privately to a contracted mining pool thats in on the service.

then yes the pool would destroy the taint of the UTXO (destroy coin-age) and due to fee then being a "new coin reward" be part of zero taint.. to then hand back to claimant as fresh coin..

however becasue the tx was broadcast publicly pre-confirm. the sender had no control over which pool would collate it into their block. thus leas logic/reason to believe it was a planned laundering

logically if you follow the data, its a bad-practice of error, making a tx which didnt spend funds properly thus leaving such a high fee due to not spending funds to enough outputs