The answer in my opinion is just to learn it in normal tuning.

Dadgad and other such tunings can limit the player to one key per song. Standard tuning allows for multiple key centres in succession.

But whatever about all that, here is the main argument

Django Reinhardt only had two fingers on his left hand. He is the middle guitarist and as you can see, his chords and his soloing are second to nobody's regardless of his 'disability'.

In fact, his lack of fingers resulted in significant innovations in guitar technique - but you can see he's good.