In an idealized "intellectual-only" world, humans would be Spock-like and be pure rational actors.
But we aren't, not even close. (And I would argue that that's a good thing, but that discussion is waaaaay out of scope).
As soon as you accept that humans, including yourself, primarily make _emotional_ decisions and not rational ones, it becomes easier to steer decisions in a healthy manner.
I used to think more along these lines. I heard someone recently talk about Spock and Captain Kirk and their approaches to different situations, and he said that most people think Spock must always be right due to his logical side. He then said that many times Kirk’s more human emotional approach actually worked out better in the end. Obviously you need a balance. Things should be logically thought out but sometimes you need to act out of empathy and sympathy towards others even when it might not make that much sense.
Also being rational =/= being cold and unemotional.