There's nothing wrong with being a one trick pony! When u develop a technique with a particular lure let's say CD 3 certainly will catch trout of all sizes if u learn how to run this lure !
It's the same with other lures of choice for trout , learn to fish what in various water conditions sometimes this just means using a float version of A plug in shallow water or the CD in faster riff water.
I fish two lures year round just vary sizes to commensurate with water conditions.
If ur a beginner then I would stick to lures that R easier to fish if u don't wish to use bait. My choices would be a spinner & plug as described .
Or u can opt out of lures & use bait like many anglers do & catch very well. The choice is really up to u , however in my opinion lures will outfish bait if used properly !
Good luck !
