Earlier quoted context omitted.
The LoTR had a great distrust of power as dangerous and corrupting - the Ring corrupted everyone who tried to use it - and a rejection of those who abided with evil. The mission was to destroy the power, not build a super-army.
Well in fact the raising of a huge army is indeed one of the goals of the protagonists. Of course for them the goal is to defeat evil. I'm sure that the people behind Palantir, Anduril and other such companies also believe they are building a military capability that will allow the United States to defeat what they see as evil. Every centre right libertarian I've encountered also has a "great distrust of power". All…
It's not. They always acknowledge that their army will be much too small to defeat Sauron's in a war. They luckily win a battle outside Gondor. They defeat Sauruman only with a deus ex machina moment of supernatural aid. But when they march on Mordor they send only a token force; they know they can't win that way. They can only slow down and distract Sauron.
The way they win is trust in innocence, a thing and a plan that Sauron can't even envision - that's explicitly Gandalf's thinking. Sauron never imagines that a couple of essentially civilian hobbits, the least powerful people, would be given the Ring, and that they'd enter Morder on their own, that they'd have the courage, and that the good guys would actually destroy something of that much power when they could use it.
> it only takes a small shift of perspective to see how the LoTR will appeal broadly to anyone who believes in good vs evil narratives
I agree in a way: People who don't read the book with a little thought can just read a superficial action adventure, good guys fight bad and win. And Peter Jackson's films are 90% the latter.