The last experience I had with Move Tutors was B2W2, and I was fine with it because you could start out your competitive movesets with the TMs you had (Swords Dance, T-Wave, Sub, U-Turn, etc) until you got the moves from the tutors. The grind for shards was annoying given the RNG nature of the cave drops.
The idea should have been to minimize the grind, not maximize the grind by 1) having to grind for points/Watts to buy TRs, 2) intentionally keeping the good moves behind TR as an artificial way to pad playing time.
And people wonder why hacking is a problem.
The grind for Watts is no different from stuff like Battle Points. They haven't done something like shards for three generations, BP has been the standard since the move to 3D.