A book that I have found very informative is 'Horse Owners Guide to Natural Hoof Care' by Jaime Jackson.
Like you I would like to find out more about both sides of the 'argument'. I feel I know more about hooves since reading the above book.
I have an Arabian which my 14 year old daughter rides. He is very relaxed and gentle. He is a high percentage Crabbet and has never been shown in Arabian shows. Like any horse I guess, he can get nervous sometimes but he gets over it quickly. He is very forgiving and a great horse. He's 11...
I don't claim to be an expert but I do have an arab. So here is my penny's worth:
My horse is a purebred arab, mostly Crabbet blood and much of the rest Polish. He is 11 yrs old and 14.3. By the weight tape he weighs 400kg. You can just feel his ribs and he looks fine.
Without a picture...