Skill is when you can actually do stuff... really good. Experience is when yoz know a lot about the game and know how it works. raid mechanics/ map knowledge etc.

Ok and lets say a person knows the raid inside and out. Will they not be skilled at it? Experience usually leads to skill all the time in the real world. Many people who have had their jobs for years are really experience and skillful at it.

You just compared a videogame with real life. I have mamy friends that still play Destiny, and they read the whole grimoire, know literally everything about this game. But they really suck tbh. There are people who play videogames for years, and still suck azz. It might fit with in some cases that experience = skill, but don't generalize it.