I believe you're just rationalizing a personal distaste. Your main argument is that the trope is overdone and we need to see different things, which is conceivably fine, but it still doesn't invalidate using gay angst as a whole.
Personally, I don't mind it at all, because I really haven't seen as much "true gay angst" as people seem to be conviced that exists. Homosexuality as a problem is most of the time just a small bump in the road when compared to whatever else the main couple is dealing. This is what I see in modern manga the most, and when I see posts like yours convinced that it's like cancer on the genre I simply cannot agree.
Like that anon said, any drama can be interesting if it's made interesting. It's not pretentious and certainly not an excuse, because tropes are the writer's tools, and their application can vary and suprise the audience in ways they wouldn't even think of; saying that they shouldn't be used is closing the door in front of potentially great works, just a step above actual censorship. Bad writing is just as bad and numerous in yuri as it is on literally any genre or media, and writers will flock to the lowest hanging fruit regardless of the trope at hand. If lesbian space pirates were the norm, it would be done just as badly most of the time like this.
I think Nakatani is referring to this idea on that twitter post of hers. It's not that the thing should or shouldn't be used, it's that, in the end, it's at the artist's discretion to use it, and consequently tied to their own skills.