Should shelling be considered a "hole"?

just curious what others thought as far as using “deletehole”?

to me it felt intuitive that “deletehole” would fill in the shell. i know there are manual ways and command combos.

Generally no.
A “hole” in terms of the DeleteHole command is a single surface that connects two surfaces. If the edge of the “hole” crosses over a surface edge DeleteHole will not work.