You seem to be ignoring what the bass that costs four times as much would do in that same "right pair of hands."
For starters, very few basses have active pickups. This kind of drives me crazy a little- people see "active bass" and think it means active pickups- it almost always means passive pickups with an active preamp, which is no more groundbreaking than plugging into a 50-year-old amplifier that has a three band EQ.
Your fingers don't have EQ knobs on them. You can adjust the tone quite a bit depending on technique variations, but you will never achieve the wide array of tones you get from boosting and cutting different EQ points. There's a reason you hear bass tones today that you didn't hear in 1961. This is the same logical fallacy proposed by people who say you shouldn't use effect pedals because tone is in the fingers, so if you're using effects you're clearly compensating for some missing aspect in your playing. One does not equal the other.
Your argument is basically the same as saying if we can't get all the nutrition we need from plain mashed spinach and boiled meat shavings, then we're doing something wrong- after all, millions of people throughout time got all their nutrition from that same meal.
Some of us just like a little more flavor than that.