This is the thing, as CROZs says and as Ed Fugua has explained in more detail on the previous page. How do you break out of these patterns and actually make music that isn't just an arpeggio?
In Jazz workshops, I have come across bass players who seem competely locked into these patterns and when it come to their turn to solo, they just seem to be repeating the same sort of thing they are playing when accompanying the rest of the time.
I think it's all about what Ed says - is the instrument playing you? Are you just playing what the instrument dictates to you by nature of its physical layout or what you really want to play or hear in your head? I've taken to listening to Jazz trumpet players and how they construct lines, as they don't have the same restriction of a physical pattern laid out on front of them.
I know you can say we are only talking about beginning bass here - but are we really expecting that people will want to stop their development on the instrument and be forever constrained to one way of playing? My view is that the moment I stop developing and learning, is the time I give up playing altogether. The pattern thing can be very hard to break out of and I think that we need to be aware of this.
Although I know Jaco's instructional video was created under sad circumstances, there are bits of it that have stayed with me and the things he says when asked for one thing to help bass players, is to learn tunes. He mentions about how bass players are never expected to learn the tune but that this helps immensely with devloping lines that aren't just standard patterns.