Why?, because they are hard to keep in place, or something else? I did have that problem with a cheap pair I had once. The ones I have now, western ones, have been fine. I've had them for 11 years. I think getting the "fit" right is the key to that. I have a small foot. Can usually wear child sizes. I finally got chold size spurs, and have no problem now.
Your statement about spurs being a pain, is why I don't like carrying a crop. It either takes up a hand, or if it's hanging from your wrist gets in the way. or gets caught on stuff and breaks the wrist strap.
Becky
It was just because the ones I had are hard to keep in place. And I ride with close contact on most horses and am not used to it. I am not opposed to wearing them if it would be easier on them than thumping on them all the time. I haven't needed them on Bay, or Cyn, or most of the horses I've ridden. I tried them on my mustang years ago, and found the cheapo clamp-on ones to be a lot of trouble so I switched to a crop.
Yes, that's my problem. A crop is in the way. Spurs live on my riding boots. I'm more inclined to not want a horse that requires a crop, that tells me that the horse won't respond to legs.