This isn't as hard as the word-twisting, hyperbole-spewing folks want it to be.
Sex and romance are a valid type of story content.
If a storyteller is otherwise ethical and includes these elements in their plots, there are no problems with it.
If someone objects to an ethical staffer including a sexual element in their plot because it is a sexual element (or romance, or mini-golf) and behaves in a petty, jealous fashion over it, and leaves my game, that's fine. They don't want to be on a game with sexual elements included in storylines, and I don't want someone who is going to react to sex with petty jealousy on my game. Thus, winning.
The problems with sex and romance that are being used to object to sex and romance in plotlines are not actually problems with sex or romance. They are problems with unethical staffers behaving unethically. That sex is the topic is irrelevant.
It's fine to prefer that sex and romance elements (or mini-golf) not appear in plots. However, it IS a preference, not an absolute, and presenting it like people using sex and romance in their plots are unethical or bad for using them? Nah.