Similarly, a lot of later grimdarker fantasy stories try to be "Tolkein but with realistic tax systems and warfare", so something like ASoIaF tries to talk about those things more, but then messes up the actual details so it's inconsistent. But if you follow the analyses on https://acoup.blog/author/aimedtact/, the battles in LoTR are very carefully thought out and realistic (based on Tolkein's personal experience) and Gondor's feudalist system is also pretty realistic (based on his academic expertise). He just talked about the details less.
I would even say they're grimmer than "grimdark" stories, half of the Gondor battle is about the enemy using psychological warfare tactics and the story ends with Frodo having to leave with the elves because he has PTSD.
(I further claim that the reason LoTR doesn't have many women isn't because he forgot about them, it's because they're doing household labor and Frodo doesn't encounter them due to being something between a celibate priest and gay.)