I stuck with Precisions for gigging for years (though am now on Mustangs due to back issues). Over that period I also had Jazzes, Stingrays, PJ basses, active basses etc but only ever used the Precisions for gigs/band use. Nothing wrong with having a variety of instruments for noodling on at home. Up to the individual if they think it’s a waste or not.
I do agree with Chris’ point though, having loads of basses won’t make me a better player, no matter how much I’d like that to be true.