In the end, we have to be completely ourselves in art though, or else we end up living other people's dreams, and for me at least, that would negate the whole point of music.
It seems to me there is a fundamentally difference in our approaches to improvisation. I view it as often a precursor to composition, and try to engage with issues like structure (I'm not sure this is always a conscious process either). You seem to view it as a "let's see what's out there?" type of process and an end in itself, which is a less constrained approach, possibly a truer form of improvisation. I have no doubt both approaches are valid, particularly if it's true that we have differing end goals.