Yeah, it can be great, but on the other hand, there are more risks for a newbie if the used bass happens to have been used and abused (worn frets, snapped or rounded off screws, knackered tuners, dodgy pots, iffy jack socket, warped neck, twisted neck, seized truss rod - followed by snapped truss rod adjuster) ...
I do agree with you personally, but then I have more than one bass, and a "project" bass is an interesting hobby for me, rather than a big disappointment / royal PITA. 👍