Ultimately, the feminist concept of "objectification" is based on the idea that male desires are illegitimate or unimportant. From the feminist perspective, men are just supposed to serve women without asking for or expecting anything in return. Without having their own independent and legitimate desires.

In other words, the concept of "objectification" is itself rather objectifying.

In any event, "objectification" is like any other feminist concept in that it doesn't stand up to scrutiny. The actual core principles of feminism are (1) more goodies (money, power, status, etc.) for women; and (2) punishment and humiliation for men. Of course, feminists don't like to admit to themselves or others that there's is an ideology of naked selfishness and hate. So they come up with concepts like "objectification" to act as philosophical fig leaves.