It's not that I don't understand that there is skill and technique and other things involved in guitar solos, it's just that, as an element of a song, I don't place as much value in it personally as many other people do. It's not really important to my appreciation of most songs. There are some where I notice and like the solo, like many Crush Luther songs, but "great" guitar players don't impress me because I don't put as much value into guitar-playing (as evident by my "punk rock level" of guitar-playing myself).
I do put more personal value in vocals, and I'm not sure why. It's not the lyrics, because I don't usually listen to the lyrics right away (unless it's Arrogant Worms or Tim Minchin where the lyrics are comedy). It's just something I place more value in, not as a conscious decision.
I'm not saying "What's the big deal about guitar solos? I could do that!" because I know that I can't, it's just that they aren't as important to me as other things. I dunno.