It seems highly unlikely, considering how important hands are for survival, the risks of a debilitating handicap or death if something went wrong, and the fact that hands don’t seem to be linked to any sort of spiritual symbolism (as opposed to eyes, forehead, etc.) in any religion, at least not to the point of doing something so extreme to them.

Even if trepanation was used in very ancient times, it had, to my understanding, some surgical goal.

So, this is yet another case of ‘research’ exhibiting poor logical skills.