I once did an experiment. I sat down with my bass, made up a bass line with a lot of octave work that was challenging to play. Then stood up with a strap and adjusted height until I could play the bass line at the same tempo. Turns out, it was quite high. Kind of looks "nerdy" but if you look at old Beatles video, they used to wear their instruments quite high. So I argue the "dumbing down" of bass lines that happened after the mid to late 60's classic rock era is partly due to bass players wearing their bass way to low to "look cool" at the expense of playability.