I spent 2005-2007 studying art (diploma in ceramics) and it was doing that that got me back interested in MBTI.
For 20 years I'd been in InfoTech (pure tech roles all the way through to senior managment). One big US company I worked for used MBTI extensively to help with all the physical and virtual teams we'd end up on. InfoTech suited my NTJness. I did things well, on time and without fuss. "results focus". Most of the techies and those with a techie background were xNTx - some great INTJ/INTP backroomers and some ENTJ/ENTP types in the more managerial and otherwise tough roles. I fitted right in.
Then in this Art course I struggled so I went back to MBTI theory and looked at it - yep a lot of the folks in the course were ISFP/ESFP with a few weak J types. They all had experience in art (virtually all were "mature age" students) and I had none. I freaked at how out of my depth I was, then I calmed down and just approached each task as I had done work projects. I ended up with the academic excellence award and one of 2 prizes for "good art". A lot of the "artistic types" just couldn't work to deadlines, and couldn't be systematic (very important in ceramics - tiny percentage differences in glazing and firing may make a big difference!). I spoke to the teachers and one of them remarked that there had been quite a few people "like me" in approach (and it turns out at least 2 of them knew they were INTJ when I asked them) who did well - good art they could do reliably and really tended to be the ones who could make a living out of their work as a result.
I don't think it's necessary to be a "professional artist" - in fact it may be better as a "profitable hobby". Yet there is a sad snobbery against "hobbyists".
Yet for 2 years I had to listen to the "creative types" talk about their ideas endlessly, and how they didn't know how they'd do them (hey, if they'd paid attention thats what the teachers were trying to teach!) and then about all the stuff that stopped them doing "it". Then they'd do it all at the last minute and almost never got their visual diary ideas into reality. Now with ceramics you need to make a piece, dry it (sometimes over days) and then do 2 firings that will take about a 48 hour time window. Lots of things can go wrong and to succeed you needed to factor that in.
I think all of us are creative - it is just that we need to find our "thing" to bring it out. Yes there's amateurs/hobbyists and then professional artists. But it takes a long time for most to build up to where they can "give up their day jobs".
As far as type goes I can see that xSFP gives you immediate access to "just what is there", good Feeling to take the idea a step further and the patience to explore how to do that (P). As an xNTJ I could come up with an idea quickly (N) and work out how to make it real (T) and just do it (J). So for me the only difference I noticed between types was a more organic approach to appearance by the SFP types, and a more precise style (sculpted etc) for the NTJs. But this was not hard and fast...
In one book on painting (we covered ceramics/drawing/painting/design/photography in the course!) there was a good "joke" about acrylic paints that could apply:
The good thing about acrylic paint is that it dries quickly, and the bad thing about acrylic paint is that it dries quickly. To me that's sort of how we have to deal with everything in life regardless of our type - know whether our preferences are likely to be an asset or a liability in a particular scenario.
as and NTJ I got my work done well and on time, but could I have taken more time to work the design through and produced something better? The SFPs had a series of fantastic ideas on paper but seldom had anything like what they wanted as the final piece in time for assessment (heck, if they had a year they would have had great pieces!).
I learned to a bit about experimenting with the type thing by trying to take a more SFP approach (couldn't do S... and struggled with F...)