Moral High ground? For being against something that hurts other players?
At least Yoshida has stated that he does not want it and seemingly this is completely in the hand of the GMs. In the end they probably wont do much against sources outside of the game but who knows how they do that ingame. About cursing: You do know that people have been banned from the forums and even got punishment ingame if someone reported them even if they meant the cursing as fun? GM will do something when someone reports the person.
I pick this because unlike cursing (we have a filter) which is still punished if told, parser and cosmedic mods, buying x amount of houses hurts players because its a limited resource. Also yes its not our job and we cant enforce it..but bringing this to the attention of SE can be done. Alot of those that have big amount of houses also often brought the attention to themselves, either by behaving badly ingame, by forum posting or by giving interviews. They then should accept if they get negative feedback about this.
If you know I am also someone that is against selling content for real money, using exploids in content and I want SE to have a clear stand with their ToS (dont punish people for talking about numbers thanks to parser but turn a blind eye on streamers with it). I am going after the housing aspect because its the topic. Its that simple. If there is another topic (which did happen in the past) that is against the ToS and even hurt players, I am posting my opinion too.
Everyone has their own line where its crossed. For some its already cursing, for others its housing, for another person its bug exploiding and someone hates them all. And all of them are in their right if its against the ToS. If you are in the end fine that someone has over 16 houses in a game that has limited amounts of them, then thats fine. Others dont need to accept it and can post their opinion about it.