I always thought that artsy INFPs were more likely to be confused with ISFPs. I've heard people make comments which seem to imply that any sense of aesthetics implies you're an ISFP & not INFP (which I entirely do not agree with). I've related more to the INTP attitude than the ISFP one as presented in type profiles, when it comes to what "kind" of INFP I am. I'm more inclined to have a pedantic know-it-all NT side emerge than any SP hedonistic side. I can be an empath, but it's hidden under a crusty exterior in person.
I've known one older INFP woman who I'd not classify as artsy, but to me she fits the empath role. I might call her "otherworldly"; she has a strongly evident spiritual bent and seems, er, "spacey". I notice these types are more frequently enneagram 9s.
I have a feeling some INFP 5s may not consider themselves artsy either, but I imagine there is a philosophical side that has its roots in Fi, not Ti. I do wonder what means these people "express" with; maybe it's more directly communicating their feelings via theory or something.
Personally, I think I'd classify as artsy though, and it's partly why INTP profiles never quite fit. I am pretty good at math, and my math & science teachers in school made it a point to let me know I was "special" for a girl in that way (gotta love that "for a girl" tag). I also do like some math & people-related science, but I've never had an affinity for it the way I do the arts & language/culture, and it's because of the feeling aspect, no doubt. My need to express feelings indirectly is more definitive of my personality than my actual abilities. I find the arts to be a more personal outlet, hence my draw to it. I did find in art school that I had an advantage over others (many of whom seemed ISFP-ish), as many were talented artists but lacked the book smarts I had. Outside of school however, I think these people have street smarts I could sorely use.
I admit, I tend to associate INFPs with being more bookish/academic & analytical than our ISFP sensory brethren. Any thoughts on that? I know there are INFPs out there who do not like literature or reading at all, & also ones who identify more with being personable/warm than analytical/cerebral.