To directly address your question, yes, this tends to be the case in fingerstyle guitar playing,. But, what's really key is the string spacing, even more than the nut width. Take, for example, my Furch, which is 45mm wide, compared to the 43mm wide Switch guitar I used in this video. Interestingly, the spacing between the first and sixth strings is pretty similar on both, so their playability isn't too different. But guitars with a 43mm nut width usually have tighter string spacing. So again, that’s generally what you’ll find.
