Personally I think boot checks are vital. If they are illegal or causing the horse discomfort in any way, the horse shouldn’t be wearing them let alone competing in them. Personally I think the checks should be stricter and incline bit, noseband, ear checks and a more stringent all over check. And not just in showjumping but across all disciplines.
I think it’s necessary to have boot checks. I know multiple people that have gotten away with ‘illegal’ boots because they were in lower level show jumping. I feel like there’s a point where we’re asking too much of our horses and we need to recognise that things might be crossing into hurting the horse rather than enhancing their performance. It should be checked and taught from a lower level to be ethical when competing in my opinion