All actual studios have a carved top and trap inlays. To answer the OP "why do some not care fore the cheaper models"
Because they're idiots
To not "care for" a particular guitar does not make someone an idiot. On the other hand, to say that "all Gibson Studios suck" might indicate that someone is mentally challenged (or trolling).
I personally have owned two Gibson Les Paul Studios. Both were excellent guitars, but I "didn't care for them" so I sold them. Specifically, I don't like the way Gibson finishes their fret ends on unbound necks. Also, I "don't care for" the 490/498 pickups that Gibson chooses to put in many of their Studios. I realize that both of these issues are easy to remedy (in fact I "fixed" both issues on mine). But ultimately I decided to sell my Studios and keep my Epiphone Elitist, just because I feel it is "more bang for the buck" and I prefer the way it feels, looks, sounds, and plays. As with just about any post on HCEG, your experience may differ from mine.