I personally don’t like Material design in general, and if I had a choice I’d pick something with Apple’s design principles.
With that said, the more the merrier so I’m definitely rooting for the app. Don’t mean to sound discouraging. It’s just a preference, but I would definitely try it out at least.
That is such a strange hill to die on though. I understand that what is legal/illegal does not always correspond to what is right, but it’s really weird to defend content like that.