I feel like that isn't the game's problem, as in custom-created content. They can prove there are safe, real-life use cases for creating custom players and sharing them with others. If you, personally, made a likeness-breaking character, it seems to me that they'd have to go after you directly for it. If I drew pictures of Mahomes and sold them for profit, he could force me to stop, right? It's not the paper or crayons' faults.
Now what they probably could do is ask EA to remove content packs that have bad imagery in them, but...good luck with that enforcement/upkeep. They can make a reasonable effort and still never get it all. Those who want it, will find it.