It's not a crotch cutout. Just as men's briefs and boxers frequently have openings so that certain necessities can be taken care of without having to completely remove the underwear, so too did bloomers frequently have such conveniences. That was especially the case in the days when such necessities were handled by visits out to an unheated latrine; you'd want to have to expose as little of your body to the cold as possible.
It's not a crotch cutout. Just as men's briefs and boxers frequently have openings so that certain necessities can be taken care of without having to completely remove the underwear, so too did bloomers frequently have such conveniences. That was especially the case in the days when such necessities were handled by visits out to an unheated latrine; you'd want to have to expose as little of your body to the cold as possible.
Why does the fact that it's designed that way for purposes of functionality make it any less a crotch cutout? The result is ultimately the same — the character's crotch is exposed through a gap in the crotch of the clothing. post #1772737 and its child post use the tag for this same sort of gap in a pair of bloomers, as well.