The article makes universal statements. ANY evidence to the contrary will disprove a universal statement.
"It is important that every domestic horse has unrestricted access to hay 24 hours a day
No, it is not. Far too many horses thrive without 24 hr access to food. It cannot be an important principle for every domestic horse
when a great many domestic horses do fine without it.
"it is not advisable to forcefully exercise horses in winter
That is a stupid statement. Everyone I know feeds their horses more in winter than in summer, and you always feed based on the totality of the horse's nutritional needs. If you do not, they either gain weight or lose it. The idea that horses need to have winters off from exercise or work is stupid. Again - millions of horses prove it can be done without harm to the horse. In fact, it keeps them in better
"The scientific thesis by Dr. Cook, which conclusively proves the harm of the bit in the horse’s sensitive mouth, has already been in print and available for YEARS, it is however yet to be included in veterinary school syllabus, and is largely unknown by vet professionals.
Again, Dr Cook's thesis that bits are cruel isn't 'unknown' by vets, but REJECTED by vets who see plenty of horses doing fine with bits. My avatar shows Mia with a curb bit in her normal riding head position and normal riding slack of reins. Does it look like she is in pain? Here is Mia in a curb with all the slack gone. Notice the gaping mouth, dripping blood, etc...and notice poor suffering Trooper in the background:
"EVERY horse ridden without natural free collection or longer than 15 minutes a day suffers pain.
Notice the word, capitalized for emphasis, "EVERY". Anyone who believes that SHOULD give up riding. But I've got a 650 lb little mustang who has carried my 175 lbs, plus tack, for an hour with no sign of resentment - and Cowboy will show strong resentment when he is uncomfortable. Mia is not a stoic horse either, but she never indicates that she is suffering pain in 15 minutes. It takes twice that long just to get some of the freshness off of her!
A website promoting universal propositions that are unsupported by facts deserves criticism.