I suppose thats just not how they think....there are some moves in a pokemons pool that just are not as effective as others.
Plus all this moveset rating/value is worked out by us based on many different things such as speed/duration, energy gain etx. And currently set by the way niantic balance the move.
We all know a little change can completey rejumble a pokemons 'best' moves, so who knows how good it will be in the future