Well depends on your view of cues. I know many who own one cue - they view it like someone might view owning an iron for clothes- you only need one to do the job.
Some players, like some golfers, own multiples bc they seek out something perceived to do the job better than what they are currently using.
Some people fall into a “ collector” category - either as a true hobby or as a sort of addiction- those people always own multiple cues and many have had a 100 or more pass through their hands- I fall into that category regarding cues- sometimes recognizing that my hobby can sometimes morph into addiction/ but always enjoyable nonetheless.