Hunter has a history of being the emergency offtank with pet tanking, misdirect, pet heals, etc. Even in current WoW hunters are perfectly capable of pet tanking M0 and lower content. The only reason they don’t is because blizzard changed pet functionality in dungeons in the past due to tanks complaining about hunters that didn’t disable taunt on their pet. Same was true of warlocks with blueberry - completely capable of tanking dungeons if blizzard had not removed the taunt/threat auto-cast capability in dungeons.
If you had ever played hunter in the past you would have known this - thus why your MM healing comment was pure trolling.