I guess everything needs a name....high- low-syndrome....hmm...
My first farrier, master farriers who learned from his father who also learned from his father, who did, with a journeyman and one apprentice, between 800 and 1000 horses a month, race horses and sport horses in prime warmblood country told me that each horse is either right-or left- handed and, from when it's born, favors one foot over the other when grazing. If nobody pays attention to the foal's feet, one high one low develops. He refused to overcorrect this once the foal was 6 months old. He believed that everything had adapted by that age. This farrier was way ahead of his time, did a trim very close to a now called barefoot trim, rolled toe and all. He trimmed my hi-low TB " normal" and we never had a problem.
I did see a barefoot trimmer, Strasser school of thought, who corrected a hi-low horse and permanently crippled it, barely pasture sound.
It's of course, entirely different if the high-low is aquired due to founder for example.