I would say if you have enough money to fight a CND then you are good to go.
MBA was supposed to be for game companies and bands, and such, to sell Merch about their game brand or band. So Amazon set it up with an eye toward ensuring that no one was trying to pass themselves off as some brand/entity that they were not. Regardless of what is on the actual shirt, if the text of your listing mentions something that turns up in the TM database, the bots fail the listing.
I mentioned SpaceX in the sales blather for a design that had nothing to do with SpaceX, other than being about space exploration. I wasn't even thinking in terms of SpaceX being a desirable keyword, just mentioned it (and NASA) by way of blather about the past and future of space exploration. Bots failed it. Any human (that didn't work for MBA) wouldn't be confused as to whether I was pretending to be SpaceX, and would clearly see that I was not selling SpaceX merch. I redid the listing without the word "SpaceX" and was bot approved. People even bought the shirt, yeah me
I understand perfectly well that many (the majority?) of shirts sold online are parasites on the IP of others, but I think MBA is the only platform where they disapprove your listing (or account) for clearly incidental or accidental use of trademarked words and phrases in the text of the listing. So, yes, people like the OP are right to be concerned, as being careless about this can cost you the opportunity to play on MBA. If they are not talking about MBA, I would like to hear the context.