What happens to all the Saints and “Holy” people that has stigmata on their hands?
Interesting dichotomy, isn't it?
Nothing happens.
If you and everyone around you grew up seeing, imagining, and meditating on the wounds in Christ's palm, would it not be fitting for God to condescend to you in that respect and grant you something that, while historically inaccurate, was an unmistakably clear sign to you and your contemporaries?
Generally speaking, signs have to be in the language of the readers or they aren't terribly useful.
Another thing I just thought of now, in considering LS’s question and maybe yours, is that the Crucifixion may not have been as we popularly imagine.
Consider the negative image of the Shroud again: https://en.m.wikipedia.org/wiki/Shroud_of_Turin#/media/File%3AFull_length_negatives_of_the_shroud_of_Turin.jpg
Here we can see the exit wound of the nail on the back of the left hand is just below the palm of the hand, into (or really through) what we may call the “wrist” today.
I was just thinking though, it’s possible that the nail was driven through, on the front of the hand, through the palm, but driven through in an almost transversal fashion so as to be at an angle with respect to the palm so it exited near the base of the hand (or at the wrist).
So when He was hanging on the Cross it would appear the nails were in His hands but in actuality they entered there and exited through the wrist. This would (maybe?) provide the support needed to support His weight on the Cross (as the nail would be through and by the stronger bones of the wrist), as well as be consistent with the Biblical account of the nails being “through the hands” as well as consistent with future Stigmata reports.
Just something to consider maybe?
Nothing.