I don’t even think its the duration its the fact that such little counterplay exists for it. The only argument ive seen is that the druid can do it at a bad time but the same can be said for any other cc. If anything any other cc is almost more punishing if cast by a healer as they have a cooldown associated with them and can break very easily. Hex / Rep / Psychic Scream etc.
I’d also like to point out all of those can be dispelled. Hex is more unique where its a curse but there at least more than answer in the fact that shamans mages and druids can insta dispel it.