Race/class restrictions are purely cultural. Physically, there is nothing stopping more combos

So you’ve seen me say this in other threads over a 1 year ago as your example lmao…

Monks are a relgious org. to the point every single legion weapon was based on Pandaren culture.

Blizzard could have not made it so heavily implied but decided to not go that route; Honestly wish monks were the 3rd priest spec instead of Disc in vanilla like orignally intended so it could be explained for every race… You know just being an unarmed devout for humans but being a Loa Primalist for Trolls.