For some people the process is more important than the outcome. If you are someone that has ideas in your head that you need to get out then it makes sense to have the instrument or piece of gear that facilitates that or that “gets out of the way” to make the idea concrete. This is especially true if you’re making music for a living, on a deadline etc. No time for procrastination!
I’m quite convinced, however, that an awful lot of people here are far more interested in the journey than the destination, even so far as to not care if there is a finished product at the end.
How many people here are buying modular gear at huge expense when they could get the same sound from a fixed-architecture synth that costs 1/4 of the price?! Or people buying and selling gear that basically does the same thing but with a slightly different interface (that’s me by the way)? The need for more or different “stuff” is in our heads because we all know that people with very limited gear have made great music. Productive people (in many disciplines) don’t chop and change all the time, they pick their tools and get on with it.
I also think many people don’t have an idea to start with, they just want to see what comes out with a setup that they enjoy. Not aiming for a style or a genre as such. Again, you don’t need much gear to do that. Whatever you make is music, irrespective of what others think of it, and it’s yours.
I think I might have gone off on a tangent a bit. Fascinating topic!