I guess I kinda did, huh. The main advantage I can think of is the defensive utiltiy. It may be frail at first, but it can not only boost its physical defense with superpower, but flying type means it has a great entry point against great tusk. I also find it funny when I first use special moves and they switch into blissey, to only be destroyed by superpower on the next turn. One time, my enamorus swept their team as between superpower, moonblast, sludge bomb and earth power, everything on their team was hit super effectively.You answered your own question. It’s not a bad Pokémon at all, it just competes for a teamslot with one of the best Pokémon in the tier, and while it does still have some advantages over it and niches it doesn’t, Valiant is still overall a better pick most of the time. Doesn’t mean it’s not gonna put in work on most teams you put it on though.
Edit: Actually, do people think an iron valiant and enamrous team would work? They have similar checks/counters that they can overwhelm/force to tera for the other to clean up.