I suppose I can see not relating to part of a persons life, but what areas would you relate to? Say if this 'jack white' you speak of was an ENFP like yourself.
How do you see that he is ENFP? Meaning what parts DO you associate with ENFP, functionally or otherwise? There must be similarities somewhere in a pattern based system right?
I relate to how he presents himself in interviews, which is probably something more common among ENFPs. But I don't relate to his darker "vibe" or the low-key voice he has in his music, which is probably more of an artistic choice. I doubt all ENFPs would go for the same exact style as him (I think Carly Rae Jepsen is ENFP as well), but I'm not going to use what I don't relate to about him as a way to push him away from my type. It's like saying, "that person isn't similar enough to me! They can't share the same type as me!" Because people will always be different from each other, whether or not they share the same type. In this case, just because Stansmith doesn't relate to DJ's "lifestyle" or whatever doesn't necessarily signify something about DJ's type, because it's not like all 6w7s are going to go about living life the same way.
We choose to like someone, or relate to someone based on our similarities. And I believe functions can be very important in directing person's mind and the way he presents himself. So I would disagree with you... I think relating or not relating to someone can give you some clue about your type. I am not saying you should type yourself just based on this one clue, but it might actually be a good starting point. For example I usually very much relate to any Fi types, when I just here an Fi person talk I always think "That's my kind of a person!" I feel the same about 4s. BTW I think Reese is an ESFJ, then relating to here Si/Ne would make much better sense for you as an ENFP.
Okay, let me pull up a list of people I relate to and what I think their types are, both celebrities and fictional characters (I'll include why too just so you can see why I relate to them):
Reese Witherspoon (ENFJ) - passionate about what she does, friendly, socially skilled, genuine human who makes mistakes, etc.
Jennifer Lawrence (ENFJ) - funny, pleasant and quick-thinking at the same time, doesn't take herself too seriously, etc.
Sasha Braus (ESFP) - spontaneous, approaches things from a unique angle, modest about her skill, forgetful of what's proper or not, etc.
Makoto Tachibana (ISFJ) - soothing, calming, puts on a happy front, concerned about his friends, loyal, helps keep people together, etc.
Kelly Clarkson (ENFP) - happy and bubbly, scatterbrained and "not all there," people-pleasing, upfront about what she believes, love-oriented, etc.
Ariana Grande (ENFP) - happy and bubbly, fun, willing to stand up for her loved ones, doesn't forget who her friends are, etc.
Rachel Greene (ESFJ) - greatly concerned about love, emotional, concerned about others, natural, etc.
Donna Pinciotti (ESTP) - fighting against social conventions, marches to the beat of her own drum, fun and silly while also having opinions and passion
Akane Kurashiki (INFP) - passionate about achieving an ideal outcome, sticks up for her ideals, sometimes forgets how she's affecting others, etc.
Aoi Asahina (ENFJ) - genuinely loyal to her friends, self-sacrificial, emotional, strives for win-win situations, feels things deeply
Brendon Urie (ENTP) - quirky, fast-talking, on the fly, spontaneous, engaging, speaks before thinking, etc.
So from this list of people I relate to, what would you say my type is? There's really only two ENFPs there, but all of them have attributes I relate to regardless of type. So even though I relate to them it doesn't really prove anything about our types. Most of my reasons could probably be attributed to ENFP-ish or so/sx-ish stuff, but that's
why I relate to them. But if I were to say I just don't relate to someone because of how he lives their life, it doesn't prove anything about his type or mine because people live their lives in different ways regardless of their type. Really pure relation can't prove anything (relating to how someone lives their life, their style or artistic choices, etc). It's the traits you see in someone you relate to that can say something about your type, which is basically the same as listing qualities you see in yourself which can be independent from relation.