Essentially, whenever one doesn't agree with someone else, both of their claims become "opinions".
Oh, how easy the world would be if that was the case :p Quoting from wikipedia:
"In general, an opinion is a judgment, viewpoint, or statement about matters commonly considered to be subjective." Some people believe Evolution to be a subjective thing, but it's not and proclaiming that "Evolution is just, like, your opinion, man" doesn't make it so :p Like MindlessAutomata was quick to remind us, going against evidence is ideology and not an opinion. Someone disagreeing about something doesn't automatically make it subjective.
Art has countless objective qualities: Logical progression and usage of material, coherency, aesthetic reasoning, technical skill, influence of and by other art, history, contextual relevancy etc. I'd dare say that (good and influential) art is quite objective and the only thing more objective than art is science. The only subjective thing in art is whether you are drawn to the aesthetic of it. The Sistine Chapel's paintings aren't less relevant, influential or masterfully done if you don't like them. An opinion regarding art would be: "I prefer Michelangelo over da Vinci". That's it. Bad art is illogical, technically unsound and aesthetically confused.
Video games are
gesamtkunstwerk, or "synthesis of the arts", they also have unique qualities that separate it from other art. Kinaesthetics and balanced and interdependent systems for example. These, along with all the other arts that video games have in them, have to be well-done. In this case, swearing and sexuality have to be made a natural part/element of the whole and not thrown in there just to be like the Witcher, like someone here mentioned :p
Nobody is forcing you (general you, not you specifically) to like any piece of art and it is your decision whether to support it or not, but claiming it's "all subjective" goes into non-genuine and ignorant territory which isn't very comfortable :p
I feel I have to have a disclaimer after every post I make - this isn't me being condescending or dismissive, I'm just sharing my expertise on the matter.
