Oh gosh.. of course solo-ing won't let a pilot get far or high enough to ever need to recover from a spin. I just think, that before you're turned loose, alone in an airplane (even in a pattern), you should know how to get it out of a spin. I mean.. if your comfy enough in a plane to fly it by yourself, but have never been in a spin (or find out a spin is something that would scare you out of piloting), it's something you should know about yourself (and an instructor should know about you) before you even get that far.
Spinning and spin recovery isn't that big a deal... it kinda boggles the mind that someone can find themselves, up in the air, in charge of an airplane, all by themselves, never having recovered from a spin.