Disagree. It's not a one-way trip, where the musician has inspiration, and the musical instrument is the vehicle. For most musicians, the musical instrument is itself a source of inspiration. That can be either expansive (look what this thing can do! wow!) or constraining (i guess i have only one option).

This is one reason why some musicians (guitarists cough) collect multiple instruments. A telecaster makes you play differently than a les paul.