It would be equally, if not more, true to say that not doing the things described in the article would be shoving political agendas and morality down your throat.
How? If this wasn't a real political theme in the past games(and the D&D universe in general), why should it be now? That's just weird. It will just come across as injecting modern political issues into a completely unrelated universe.
The complete omission of same-gender romances in the original games, for example, is at odds with reality, because gay and bi people exist.
You know as well as I do that these things are socially stigmatized in most modern, and especially in old, cultures. So if nothing was done with it in the past games, why should something be done with it now? Also the absente or presence of something doesn't constitute the pushing of political and moral agenda's. The problem occurs when it's done in places where it doesn't belong.
I personally don't care if they put same-sex romance options in, as long as it's done properly - and in context of the other two games I'd expect it to be a more hush-hush thing. And yes, if you want to do this properly, you need to include both pro and anti same-sex/trans (and so on) agendas, and sexism and racism should also be included. If you just put forward one of the two, that would constitute the pushing of a specific political agenda to me - especially in a game that's all about choices.