Walmart doesn't build bikes. Unless you are just talking about the underexperienced guy putting the wheels and handlebars on when it's taken out of the box.
Most of your post looked like cut and paste from other stuff so I didn't read it. Sorry....
I will admit that they sell some cheaply built bikes. But if it weren't for those cheaply built bikes my sons would not have had a bike to ride while they were growing up. I certainly didn't make the money then to afford a "real" bike.