The other day, I wrote something on paper, and then worked out how to play it on my 4 string, and enjoyed deciding the exact points where I would go up and down the fretboard, taking into account where the natural breaks in the phrases were, and also thinking about the different sounds the same notes make on the various strings. Once I was done, I noticed that on a 5 string, I could have played the whole thing in one single position. So the limitations of the 4 string obliged me to engage thoughtfully with my task, whilst a 5 string would have indulged my tendency towards laziness.
The OP has written about how having an additional high string is opening up his creativity, so quite the opposite. Everyone's different
I note that if Jaco had wanted six strings, he could easily have pulled the frets out of a Fender Jazz VI....but then, what kind of serious musician would play a short-scale, eh? 🤪