Not to mention the tedium of the cut scenes where sex is depicted. But you’re right that I have a double standard in one regard: I’ll put up with lengthier cut scenes with magic explosions and plot advancements than I will put up with cut scenes that are herky CG sex.
Ah, I'd suggest you check the digit on your game install again. It appears you've played The Witcher (the 1st game of the trilogy). That was indeed a bit ridiculous. On the other hand, it's not like being strong, handsome, famous and famously infertile is a bad strategy for getting laid. That said, most of the sexuality/romance should probably be kept out of scene unless it contributes to the plot in some way, which is what Witcher 3 does. Whenever you can have sex with someone it is because this either advances the main romance plot or because it reveals an interesting facet of a person.
Not to mention, part of the appeal of the game is not knowing if those quests are going to end well or not. Some quests don't have good endings, while others depend on your choices, making you responsible for what happens.
And regarding "softcore porn", it's only simple bed scenes, like in any movie. It's totally normal, and given that there is a huge romance plot with 3 different endings, not counting the expansions, it would be silly to tell such a story without mention to sex. In any case, it tells a lot that people are so scandalized by sex, but not by the continous gore, violence, inequality and misery that The Witcher 3 portrays continously.