Making one mistake shouldn't mean "lol, I lost the game". If you have to play extremely carefully around moon to that point, then that is not healthy. You also say "don't give it free turns" when that is the easiest thing for moon to do because it threatens a lot of tier staples. Ghold, tusk, glowking all are threatened by it. Many others can not do a lot of damage to it, so let's extend that list to include Gliscor, Rillaboom and Ting-Lu. There are most likely others I am missing, but the point is that the free turns it gets are easy to attain. Then, if you are having to sacrifice a slower mon all the time against it, that still isn't healthy, because you should be able to check a mon without sacking something.