I know. I mean, you can wear suit pants/skirt without the jacket, but you can't do the reverse.
Although in general, I try to wear the suit all together and buy dress pants on their own, because once you start dry cleaning the items, if you wear the pants more than you wear the jacket, the suit starts not to match, especially if it's a darker color.
I think Clarkson had it right, actually. Lighter colored blazer with jeans, it's a classic look.