Classic Why should I care about torghast gems?

The only rewards I can think of related to the gems are:Getting the next layerFlawless run achievesAdamant VaultsAre there any other reasons to go for higher gem count that I’m missing? I want to know if I can chill out with the “skip nothing” playstyle that is forced to get high gem runs via /r/wow https://ift.tt/3qEJHuE