You're 100% right that you can find cheaper housing in Auburn, Federal Way (mind the gunshots), Everett, or even Spokane. The problem is that living in none of those places gets you the walkable, diverse lifestyle of being in Seattle.
Also, thanks for painting all Texas schools with such a broad brush. I graduated from a north Texas (public, non-charter) high school that is well-ranked, in addition to graduating from a state college for my CSCI degree. My siblings came after me through the same school, one as recently as 5 years ago, and none of us are drooling founts of stupidity who can barely sign our own names. It's almost as though different areas have different levels of achievement in their schools.