Is "hardcore-viable" a meaningless descriptor?

how many personal/subjective or "universally undefined"meanings are you applying there? because i count atleast 3

so, if when a build has a HC viable label, and we have 3 people in the room, the author and 2 players
the Author is the one slapping HC viable meaning on it
player 1 infers X meaning
player 2 infers Y meaning
after playing it player 1 and 2 applies Z meaning, because one of them died before lvl 50 and the other gave up struggling so much but didnt’ technically die just gave up before finishing, etc etc make up your own 310 scenarios all differing from the Author’s experience in multiple ways
“what is the meaning of HC viable” then ?