Need is an extremely loaded term that I rarely find helpful.

There is one's preferred optimal level, there are less than optimal levels that one is willing to accept, and less than optimal levels that one will not accept. If that second zone is a null set, you are something of a douchebag, barring hypothetical gymnastics. An unwillingness to trade of any of your preferences for the good of your relationship or your partner does make you a douchebag.

This gets a little more complicated in binary situations, where it's not the amount of sex, but whether you have any at all. As some have pointed out (maybe you?) there are ways to make that less binary, and find mutually agreeable alternatives, so that again, zone 2 is non empty.

Or do you explicitly need for the less sexual partner to be labelled 'bad' by external observers for the scenario to be satisfying to you?

No, only that the same potential exists for them to be labelled as bad as their more sexed partners. That's the point of the original - why is the partner who wants more automatically the bad guy?