Your driving or your martial arts? I recently avoided an accident that could have proven very serious. My reactions were amazingly instinctive, concise and fluid. This started me thinking about my training and while I have fleeting moments of greatness, I also have many moments where I simply put way too much thought into it. Much more often than in my driving.
My commutes changed over the years, and sometimes I work hybrid vs. onsite vs. driving everywhere. But looking purely at driving for work, I probably average 20 minutes each way, which I'd guess is a healthy average, or on the shorter end.
Assuming 2 weeks vacation, that's 40 minutes a day, 5 days a week, 50 weeks a year. 40*5*50 = 10,000 minutes a year of driving. Not including personal driving, which I'm not sure how I'd calculate.
I'd say on average in a given year I'll go 3 classes a week about an hour each. Some years the classes are longer, sometimes I go more often, but I think that's a good average. I'll assume 2 weeks off there as well. 3*60*50 = 9000 minutes.
Ultimately, 10k minutes driving each year vs 9k minutes training isn't too far off. And there's personal driving that I do outside of that, but also personal training I do outside of class.
So I'm going to rule time out as a factor here for which one's more engrained in me. Which brings it down to active/intentional learning.
This is kind of a side thing, but I remember a study my pastor pointed me too when I asked him about a similar question, where pastors/priests were found to have not memorized the communion liturgy without having it in front of them, despite reading it weekly, because they were not focusing on memorizing/deeply understanding the words. I think that's a fair comparison here, if a bit stretched.
So, on to intentional learning: Driving is scary, you have a lot of power, there's a lot of things you have to look towards, and a lot of rules to remember. So initially, driving has the jump there in getting you to internalize/instinctualize it. But, at some point there's no new things to learn, and you start phoning it in. I'm sure we've all experienced those moments where we drove somewhere, and afterwards don't remember the drive. That means that even if we're putting in the minutes driving, it's not getting through to us on a meaningful level.
Meanwhile, in martial arts the initial stakes aren't as high, and never become as high. But you have to spend more time actively learning, because there's always new things. Once you learn how to properly send your force through your strikes, you have to learn to add footwork to it. Then timing. Then deal with other timing, etc. There's similar additional complexities in grappling arts. So it's always more of an active learning situation, and when we train (or at least for me) if we learn something new, we're probably reviewing it over the course of the next few days in our heads, or even drilling it while in between other tasks.
So ultimately, spending roughly the same amount of time engaging in both activities, my guess would be that martial arts are more instinctive, because the time we spend on them is purposeful learning, while the time we spend driving is a rote activity.