Personal observations and opinions here, so don't shout too loud if you disagree.

There are a small number of first person songs that really do demand to be sung by one sex or the other, mainly women.

There is a much, much larger number of such songs that are easier to make work if sung by one sex. A reasonable performer of one sex might be able to make it work, but it would take a really good one of the other sex to do so.

Any collection (ie an album or evenings worth, not two songs) of songs on the same subject, from similar perspectives will seem boring, unless they are good songs, and selected very carefully.