That is really cool to see… and very inspiring as well! And, to answer your main question: yes, in my opinion, there’s got to be virtually infinite possibilities to construct bass lines! However, there are some ground rules, and @JoshFossgreen has laid them out for us in his course. Without having analyzed the bass lines shown here in more detail, it seems obvious, however, that the good ones “listen” to the drums (i.e., where the bass drum and snare drum hits are), and make prominent use of root-fifth-octave patterns (with adornments and embellishments). And, I guess, there must have been some information/request on the root/scale (and perhaps style) given by the “customer”, which we didn’t get to see.
You know, this got me thinking: maybe Josh could make a similar challenge for his “students”!?! Obviously, somewhat adjusted to our abilities (i.e., simpler drum groove, a bit slower tempo, only for “students” having finished most modules, …). All sent in bass lines could then be made available for our mutual enjoyment and education via this forum; perhaps with a few comments as feedback from Josh and/or @Gio. Finally, those two could perhaps add a few examples of bass lines they came up with themselves, just for further inspiration!?!
That could really get my creative juices flowing