I think we can teach a horse to respond to whatever cues we want to use.
If the horse has cues we don't want, we can have them fade by not using them and using others in their place.
That is assuming that we have a horse with the ability and talent and training for what we want to start with.
I say, it is up to us the riders to be consistent and clear and so our horses, nice as they are to oblige, can do what we ask of them without confusion.
I was talking to a trainer that had a wp horse he bought from someone that wanted to make an arena roping horse out of him and gave up.
Mind you, maybe you can do so with some, but why get a horse bred to be a square peg, trained to be a square peg and ridden like the very nice square peg he is for years and then make everyone miserable, the rider and horse, trying to make that poor horse fit a round hole?
It would be wonderful if everyone would ride the same and ask with the same cues.
That is very much so in Europe and in most English riding.
We can get on a jumper or dressage horse anywhere and very much expect it to ride the same or close enough we can perform well.
I seem to think that, in western riding, there is so much more variety in what all is done in each different discipline that a rider needs to be more versatile to get a reining/cutting/roping/wp pleasure horse to go well for them, because they don't all use anywhere close to the same aids.
That is not even touching on gaited horses, that are a whole different world in themselves.
I think that good horsemen will understand that and not dismiss what they don't know about offhand, just because it is different and looks strange or even absurd to them.
You can't believe how out of this world the three and five gaited horses in Madison Square Garden looked to me the first time I saw them and then watched them motoring along.
I was there with the jumpers, had never seen anything like that.
Those "horses?" seemed clear out of some fantasy world, incredible that anyone anywhere would have horses that looked like that and moved like that.
I thought I knew what those were from reading about them and seeing pictures.
The reality was vastly different once seeing them in person.
Wp horses don't hold a candle to them, when it comes to extremes of what we can do with horses that is out of the norm.
As long as no one is using abusive methods to train and ride ANY horse in ANY way out there, well, "different strokes ... " and all that.
For those that point to abuses in wp training, abuses do happen in ALL we do and not just with horses, sadly.
Abuses are illegal and unacceptable in anything we do.
BUT, just because someone trains and rides their horses in a different to vastly different manner than we do, that doesn't mean it is basically and generally objectionable in itself.
There enters the live and let live, a respect for what others choose to do and hoping they will then respect what we do.