That doesn't really suprise me, tbh.
I think it's really the 7th and 8th functions that get ignored the most.
And, in a lot of cases, the 5th and 6th functions are even more developed than the 3rd and 4th.
Someone with all Fe and no Fi would seem to be someone with little to no spine (imo), and you don't seem to be that kind of person.
Still, a natural Fe-user with well-developed Fi, and a natural Fi-user with well-developed Fe, will still prefer their natural function, imo.