Eventually? Yes, of course. WoW players also have a tendency to ruin things by burning themselves out. This system isn't intended to be no-lifed, but a bunch of people are going to no-life it and then complain a month into the expansion that there's no content. The community also has a way of ruining things by making everything about the 'meta'. So, eventually, Torghast will become a mindless grind where everyone chooses the same powers, blasts through to whatever the highest reward floor is, then bounce.
Even still it's my most anticipated feature for Shadowlands and I'm super excited. I'm going to take the approach of grinding it hardcore initially to get all my legendaries, then I'll take it slow and make a weekly or bi-weekly event out of it with some friends. Get drunk and just head into the tower. Can't wait.