I think this season it’s much easier (haven’t done it myself but that’s the feeling I get from doing 15s, seems a lot easier than last season).
But in general… I would think someone who earns ksm entirely legit and pugging it, meaning they don’t have their mythic raid friends carrying them, means at the very least they’re a decent player who can understand simple mechanics and respond appropriately.
Then again people can just buy ksm runs so who knows lol.