I will just add, I am NOT a breeder, I will admit, I don’t have a 10th of the experience many people on here do.
But there are GOOD breeding operations, which handle things well, and there are BAD breeders.
I got my start riding with a Arabian sport horse breeder - and witnessed a number of live covers there. I don’t remember any extreme dramatics. Their stallion was well socialized, and knew his job. Their mares were handled well, with minimal restraints, and every thing seemed to go smoothly. Same goes for the other breeder I knew (TBs for sport).
AND - then there was the BAD breeder. I was riding a few horses at the same barn as a lady who was breeding TB crosses for the hunter ring.
The stallion was old, and looked well past his prime - maybe that is why the mares seemed to reject him so vehemently.
But it was UGLY, mares twitched, tied, restrained, man handled - WILD EYED with fear. I saw one mare break away from her handler, and proceed to run THROUGH two wooden fences to get away from the stallion.
Beyond not willing to stand, I witnessed at least 3 mares that didn’t want to be in the same county as this stallion. Panic stricken, they were doing everything in their power to get away from him.
I don’t know all of the “whys” this breeder was having such an issue, but it was certainly stressful and violent for the mares.
What I witnessed was abusive in my eyes, and I would never in a million years want to subject my mare to it.
So, while I had no objections to what I saw go on at the first two breeders - the third, uggg…not pretty, and not something I would subject an animal to.
The other “issue” I have with restraints - while I am sure its a rarity. I know that occasionally mares are injured, sometimes quite severely from being penetrated too deeply. I have a hard time believing a mare would willingly stand as she was getting injured quite painfully - and that restraints most likely play a role. And I know “breeding rolls” can be used to prevent these injuries - but some mares still experience them - so the breeders weren’t using the rolls - or didn’t use them properly.