Should bitless bridles be legalised in dressage events and to what extent are they a better option than traditional bridles

1.What country are you from?(Required.)
2.What discipline do you ride?(Required.)
3.Do you currently use a bitless bridle? If so, what type?(Required.)
4.What current rules are in place in your country regarding the use of bitless bridles at competitions?(Required.)
5.Do you believe bitless bridles have benefits for the rider that traditional bitted bridles may not have?(Required.)
6.To what extent do you believe that using a bitless bridle is better for the horse?(Required.)
7.Do you believe that bitless bridles should be allowed in dressage? Why or why not?(Required.)
8.Have you noticed any changes (positive or negative) after using a bitless bridle on your horse, as opposed to a traditional bridle?
9.Why do you believe most countries prohibit bitless bridles in dressage?(Required.)
10.Following from Q9, Why do you believe this?