Huh? I have the problem that suit shirts either squeeze my neck giving me a headache, or have to be comically oversized. Like OP, I think I just have non-standard proportions.

But when my wife made a shirt after my actual measurements as an experiment, it did not squeeze my neck and was very comfortable. I loved that shirt and used it for many years until it fell apart (unfortunately it wasn't made of the finest materials, and I don't have the wife any longer either).

So I'd think adjustments can absolutely help comfort.