I understand that, but what do want? A short, slightly stubby neck, or a potentially painful neck and shoulders and limited upper body movement?
It's your genetics and that's really all I can say, other than many peoples genetics, cause them to be born with almost unimaginable physical issues, that last for life, so in context a short neck seems like a drop in the ocean, if you catch my drift.
I'm not being blunt, just honest. You deserve that at least