If people are leaving the show because they can't handle the show's politics than that is on them, and not the show, and as long as the show since it's not canceled, I say good riddence. I still with 100% honesty don't understand how any decent person could be offended by anything on the show anyways.
Let's say you have an issue with a show--any issue--wouldn't you say something? Not every issue is a dealbreaker that would make you want to stop watching, but that doesn't mean you can't speak your mind, and you should be entitled to do so without fake outrage. If you had an issue with Star Trek, and how a character is being written, would you stop watching, or would you speak your mind in hopes of improvement? How many shows have been altered when writers heard the complaints?
If they are the kind of writers you are talking about, then I hope they stay as far away from the show as possible.
Comic book writers? Hell, these writers have the talent, but they choose to go in other directions. They have turned some great characters into political activists that are not very likeable to half the country.
Alex is Kara's sister, and has been a major part of the show since the beginning, so she has every write to have this kind of story. Just because you can't handle doesn't mean it shouldn't be on the show.
This is a comic book hero show. This is the end of the season. If they weren't trying to show how "woke" they are, they wouldn't be shoving 20 minutes of Alex being a mom into one of the last episodes of the season.
This storyline is revelant and interesting, and Kelly is a new character, but it looks like they are setting her up to be play an important part in Alex's life, so there's plenty of reason for her to be involved in this story. If things keep going the way they appear be going, and Alex does end up adopting a baby, then Kelly's probably going end up being the other parent.
Not on a comic book show. Maybe on a spin off.
That's really not the best example for this kind of a situation, because I saw quite few people complaining about how Sulu's sexuality was handled in Star Trek Beyond.
Well, I think you are thinking more of the decision to make Sulu gay, rather than the execution. Even George Takei didn't like making Sulu gay--just because he is. Yes, that was a PC move, BUT, and there's a big difference--the execution of how it was done was so much better than anything they do on Supergirl.
They didn't make a big deal out of Sulu's sexuality. It just was. He had a significant other, he had a family, and they greeted each other no differently than any other family. It's not like they broke from the action to give Sulu half the movie.
Ironically, the closest equivalent in Abrams Star Trek is a romance that is straight--Spock and Uhura. Like Alex, it's forced on the audience, many of whom don't want to see it, and it took away from the main story.