What do you mean by /all?

If you mean /all on lemmy.ml, then yeah, it should, it's what that site is for. If you mean /all on beehaw.org, that is a different /all. You could certainly debate with the beehaw community/admins about whether or not the lemmy.ml memes community belongs there and if the general consensus is that it should stay, you can block the community for yourself. That's not the same as telling people who are using the community as intended that they are wrong for doing so.