@Maverickess
I agree (even havng been around them so much - or maybe especially).
Maaaybe (as I posted) they did allow themselves to be domesticated, in order to live a "better" life, and the relationship grew - until here we are....
The mustangs in America are now (I have heard) culled, due to being so many in number, but their resources are inadequate, even as big as the country is. And here on our small island, the animals are not left to be truly wild (apart from Dartmoor, even there, there are issues), so there is some kind of management, nd it can include rounding up and going to market.
I cannot stand to think of horses being stabled for long periods, it is physically and mentally harmful - but then just turning them out and forgetting (as sometimes happens)is, as they are unable to wander, and fend for themselves and kep warm/cool etc. - just as bad, although that is both ends of the spectrum.
We owe them a lot, once we take them on, whether they are ridden or not - and, like you, I am starting to really struggle with what we "use" them for. I had a miniature horse who onbviously could not be ridden, or driven - and my husband once asked "What's the point of her?" [he is, of course, an ex-husband], and in effect, we almost killed her with kindness, as she was not allowed to be out with the big horses, so gained weight wih her limited turnout and exercise. She also beamee quite grumpy. She went off to a new home with more space and lots of mini friends!
I kept my old boy in retirement from 2007, to 2013 - and he did not need to be ridden to earn his food and shelter and care. I was just as happy to be on the ground alongside him out for a stroll - and we usually didn't need a rope.
(He was a thorouhgbred e-racehorse, so I considered myself very priveleged that he would be so calm.)
Horses, like every other animal on this planet, were not put here for our enjoyment, entertainment, company, service or food source. I often refer people to the documentary "Earthlings" in case you haven't seen it or might want to (once is enough). My already strong beliefs were very much reinforced after seeing it.