"Rape must NEVER be confused with sex.

Rape is nothing to do with sex it is a violent assault."

Once again, at the risk of being beat over my head with a slogan, this is a generality that is not totally accurate.

Because there are many, many 'violent assults' that do NOT include sex, we must account for those which do.

It IS inexcusable for any man, at any time, to use violence to obtain sex, just as it is inexcusable for anyone to use violence except in response TO violence.
I am sure that men who are serial rapists, or who may never have actually committed rape, but constantly intimidate and sexually harass women, are acting out feeling that go way beyond simple 'sex', but a chanted slogan that "rape is always about power" is way too simplistic. Sex...and the frustrations of how to sublimate it...ARE involved in rape in many cases.
This does not change the fact that violence is not to be tolerated, whether or not it is manifested in sex.