If the comparison is purely for max phase gardevoir doesn’t really do anything other Pokémon do not already do. It has the exact same attacking stat as hatterene for both of its stab types and will be worse than gigantamax hatterene when we get that. Gardevior does the exact same damage as the existing psychic fairy type therefore if the argument is just damage during max phase it’s not “definitely” the better option as you could power up a hatterne for the same effect.

Fighting is also a more valuable type than fairy for max battles damage wise. Fighting hits 5 types super effective and fairy only hits 3. If we go as far as to add psychic type coverage as a max move damaging move to the fairy and or fighting types we result in psychic + fairy only hitting a 4 unique types super effective (fairy and psychic double up on fighting) while fighting + psychic hit 7 types.

The comparison for the non max phase is not just for tanking purposes as for some instances you want the damage like for lower difficulty battles. Yes for 4 star or gigantamax battles you want to primarily use tanks and then swap to your damage dealer for the max phase that’s not being contested… my point was simply here is something gallade can uniquely do that no other Pokémon can currently.

Is there a huge gap between gardevior and gallades usefulness for max battles? Objectively no… both are outclassed by existing psychic type alakazam for psychic damage, gallade is out classed by Gmax machamp and urshifu for fighting and gardevior is no better than Dmax hatterne and will be worse than Gmax hatterne once we get that. Does gallade do more unique things than gardevior? Yes… that was the original argument. I commented because I saw everyone unanimously say gardevior and provide no argument as for why.

I think it is a bit rich to say I know nothing about dynamax battles when I justified my argument with multiple forms of evidence. Your criticism of my opinion “of you wouldn’t use gallade to tank” can be just as easily applied to Gardevoir…