Oppression in common usage appears to signify systematic stereotyping with a net negative effect for the population group in question, or specific behaviors associated with oppression of a group, in which case neither males nor white males are oppressed, even though there are indubitably cases where discrimination and cognitive biases turn out negatively for specific subgroups (such as male nurses, cuckolds, divorcees, etc.)

A specific factor having a net negative effect does not preclude other factors resulting in a net positive relative to other groups, unless I parsed that wrong.

"Objectification" is another such concept. We know that it's yet another piece of jargon for a bad thing that men do to women. But we don't really know what it and why it's wrong, nor it is demarcated from ethical forms of imagery.

Objectification is a well-defined and experimentally verified to exist phenomenon by which women in western society at least judge themselves by the impression others have of their physical bodies, which correlates, amongst other things, to eating disorders

That is an excellent definition and we should probably adopt it here, but it doesn't quite match up with common usage in most situations.

Also, a belated hi. Sure hope you decided to stick around.