Listen to Nathan Watts and you get the same type of bass line. It sounds great in the mix, but when he takes a break (at about 3.30) the sound is clunky, buzzy, over played and pretty horrible.
https://www.youtube.com/watch?v=c6f6BOKXXxg
The reality is that these bass parts were never designed to be heard in isolation. They were a signal provided to the desk where they would be re-EQ'd, compressed and mixed into the track. Listen to the original Motown mix of I Want You Back and compare it to the remixed HD version. The HD version is the same bass line but has a much better, fuller overall sound, because nowadays songs are intended to be played to the listener on speakers designed to a much higher spec.