You're at least not the only one, though in my case it appears to just be my natural state rather than being related to anything I learned.

(My first 'wait, what?' moment relating to meditation was when I was a teenager, newly out of being Christian, just starting to look into new age stuff, not even aware of rationality as a potential thing to be pursued. I got a book on meditation and concluded that I must be misunderstanding it because all the stuff it talked about about involuntarily thinking about things and having to put a lot of effort into quieting those thoughts was so foreign to my actual experience.)