The guy is off in la la land along with Stormy May
That is because he is extreme.
However, there are numerous other scientific studies done on the effect of the bit and this are in line with his. Does this make him mister wonderful, no.
Bits do long term damage even in the best of hands and the science proves this. Does this mean we can't ride with bits, no, it means we should be aware of the end results and make the appropriate changes in how we use bits and the type of bits we use.
Yes, I personally endorse bitless, however, bitless is ridden more often incorrectly too. We as riders have the fiduciary duty to ride with due diligence regarding how and what actions we induce upon our horses, whether it is bitted or unbitted, ridden or unridden.
Oh and some of the out of the box so called evidence provided in Stormy May's diatribe regarding the horse's back is false.........