Just how smart is The One Ring, really?

Does it, though?

I mean, we’re kind of getting into the weeds here – to the extent that “magic” means “can do anything” – but for all I know, the ring just mindlessly pumps out a signal that lowers the inhibitions and amplifies the cravings of the current wearer, and maybe even occasionally acts as a hallucinogen (bearing in mind that, here in the real world, there of course are hallucinogens that are just unthinking chemicals, just like addictive substances can be unthinking chemicals too).

Just to switch universes for a moment, IIRC the X-Men once had an up-and-coming member who could hit folks with a “now see the illusion of your greatest fear” power; and until that illusion appeared, even she didn’t know what was going to pop up: the idea is, she just switches her power ‘on’, and then it just triggers the key part of someone’s brain without her reading the guy’s mind or whatever.

I know that someone or other says that about Bombadil – but what always has me scratching my head, is what Bombadil actually does, on his own initiative:

It’s just a jumps-out-at-me point I keep coming back to, is all.