You keep changing the main concept of it. Everyone but you pretty much agrees a hybrid is a class that can do more than DPS. The definition is 20 years old and is in the actual guide book that came with the 4 disc physical copy of vanilla.
And now you can even swap in boss fights to do it optimally. It’s like hybrids are even more hybrid. A rogue can go from DPS to tank in combat with vanish and do it optimally, instead of just meh.