I've been in many show barns that were not like that at all. I've been around wonderful competitive trainers and their horses were never, ever treated badly. Those folks seem to live their whole lives around those horses.
A good many show barns are a lot of fun to be in. The horses are treated like kings and queens. Firm treatment isn't unusual, but losses of temper and knocking horses around is unusual in these barns.
I don't feel horses must be turned out for many hours, but I think that if they are NOT turned out for many hours, there is a huge responsibility there to make up for those hours with something that gives them an awful lot of attention, exercise and socializing.
Whenever we've had to 'lay up' a horse for an injury, we've found that they think that we should stay home, pretty much full time and entertain them. Grooming, massage, hand grazing, that would be fine, just be sure not to stop. Even more horrifying, you can go out there at 10 o'clock at night or 4 am, and they are all ready to do it all over again.
I had my horse at a quarantine barn that was like a horsey heaven. Turnout was restricted for obvious reasons, but the horses got hand grazed, went on a Eurociser (some of them several times a day), got ridden, and got 6 little meals a day, just to keep them amused and constantly entertained. A nice grooming and massage, anything they needed.
Of course Guess Who footed the bill, but it was worth it.
In my experience, top sport horses seem to get really royal treatment. I was rather appalled to see one such horse march off dragging a groom after him as he sought out the nicest grass, but the groom told me, 'Oh, I have instructions - I'm to allow him to go where ever he likes!' The horse certainly seemed to be taking full advantage of it.
Celt - you're 'doing up' 5 horses - I did up TWO for a dressage rider and it took me a full eight hours a day. LOL.
I think the Eurociser is one of the most ingenious things that ever got invented. The Spanish Riding School has what is I think the biggest one in the world - it can take 12 horses at a time.
I'm not sure why but they seem to like it so much better than a hot walker, perhaps because of the longer straight sections and because they are not tied to anything, but also the fact that it can go faster is probably appealing.
The horses appear to think it's the greatest thing since sliced bread. I never got dragged so hard by a horse as out to the Eurociser. They seem to very much enjoy following each other.
Too bad they're so expensive. I have my own inexpensive alternative - ME. I'm the Eurociser at my house, LOL!