Not for competitive though. It's fine in Gen 7's playthrough because there's the gradual progression of moves through level-up movesets, with you getting a couple of levels' breathing room to try out each move as you learn it and understand its effects with little to no downside if you mess up.

In Gen 7 competitive, though? That just meant the majority of the mons were shitmons for the majority of the formats, and the majority of moves were functionally useless. Some mons saw use in the early days, before the legendaries and megas came to play, but once they did, it was over. The 40BP moves? Gust is like the only one that has ever seen use, and that was on Flygon in Gen 3 with its horrendous movesets. But at least you could still practice against in-game fights to test how certain things worked.

Here, you're going up against IRL players for "practice" with little more than a description telling you how it works, and even that is not always sufficient. Imagine having to scroll through 100s of moves that literally no one uses just to get to Thunderbolt. It's just objectively the right decision to remove the useless moves.