Then suck it up and do the thing that you need to do to unlock the skin.
Or on the other hand, accept that you won't do the thing needed and accept that you won't get the skin.
Also it would take 2 months assuming a different boss spawns every week (wasn't the case on beta) to get the other "easy" skin. World bosses are intended to be group content, not just tag and die and loot. Pretty much goes in line with what they've been attempting with legion.
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Basically this. I cannot repeat this enough.