With regards to "not flapping" a "flappable" phoneme, I wonder if there is a connection between learning a word from hearing it used vs having learning by first

With regards to "not flapping" a "flappable" phoneme, I wonder if there is a connection between learning a word from hearing it used vs having learning by first encountering it in print. I find there are such outliers in my speech. I don't remember where I first encountered most words, but I did start reading young. (I often pronounce the T in "rocketed" or "rocketing" but never the one in "often" :))