You can tell that Roddenberry always considered Star Fleet to be conservative in TOS. They were practically a navy. Kirk and Scotty were both military men, as were many other members of the crew.

Personally, I’m fine with this. I like that even Star Fleet has improved over the course of the show. Humanity should improve as we meet new life and civilizations. And in SNW, we saw that, even back then, there were Star Fleet officers like we know in the future, who were horrified by Star Fleet’s militarization. It improves the believability of the setting IMO