WotLK But why ?

[nameles]

Why can I join with level 78-79 twinks in that dungeon, but the mount has a level 80 restriction?

https://imgur.com/a/iimVwjk

[OhieMitzen]

Why can I join with level 78-79 twinks in that dungeon, but the mount has a level 80 restriction?

https://imgur.com/a/iimVwjk

Because it's a mount intended for level 80's.

The dungeon allowing 78+ to join doesn't mean it's made like that for twinks.

[Shred92]

That decision was made by Blizzard so you should sign up to their forums and ask there.

[Decimathorus]

Blizzlike rules... what else do you want.