I joke about that, honestly. I use them quite strategically. I know that you can lose health right after you use them, so I try to attack instead and if the enemy goes down, then I use a healing item. If they don't, then it's either I take a huge risk or use a healing item.
Not in Sun and Moon they don't lol. Let's just say my battle against Kukui was a long one...
Those are for really skilled people. As of against other players, I think the removal of healing items really helps make it more special and challenging. But in game? I'm totally gonna use them.
Honestly even with that there's a chance that someone could use a really strong super-effective move and KO your Pokemon. It's more safe, sure, but you never know.
I dunno, defeating the Elite Four, becoming the Champion, and catching Legendaries feels pretty honorable in itself. But whatever floats your boat I guess. Just don't call them cheap.