What about Discovery felt like it had a spotlight on it more than "Let That Be Your Last Battlefield"? Or that TOS put a diverse cast front and center on the screen, including folks hailing from nations that were currently/recently enemies of the USA at the time? I grew up watching TNG, and the way Geordi turned the concept of what it meant to be 'disabled' on its head felt really pointed, even for child me. Likewise the dehumanization of Data.
I'm happy to gripe about worse writing, but if someone wrote a shoddy story that included a couple giraffes (because giraffes were more popular nation-wide), I wouldn't get mad about "giraffe messages" in entertainment, I'd get mad about shit writing.