Could someone explain to me the rationale of competitive rides in
  not allowing boots on horses?  Why can't they just assess a fixed
  point penalty and let me compete with boots instead of telling me
  I can't use equipment my horse needs?  I know he's not a clean mover
  sometimes (like when he's excited, tired or spooking), but it seems
  mean to make him hit himself just because the rules say he's a better
  trail horse if he doesn't.  Thoughts?  Comments?  Thanks.