I think it would be more appropriate to say that I RECOGNIZED shapes rather than depended on them. I learned to play in an old school, self-taught fashion....by playing the same songs over, and over, and over, rewinding the cassette or cd over parts. I swear I practiced 6-7 hours a day using that method. After one year, however, I knew a good amount of the notes by being subjected to them, there aren't that many, but I recognized that most songs follow a pattern, and, if you learn that pattern, respectively to each song, then you've learned the song in its basic form. From there, improv was/could be heavy, always knowing alternates to play through shear trial and error, being subjected to the material.
At this point, 20 years later, no longer 13 years old, I learned shapes/scales/notes/etc., and I am glad I do. So, do you think a bassist would be scary on stage only knowing patterns? Depends on the individual, depends on how you approach music, depends on you being a cookie cutter or an artist. Too many variables.