I wholeheartedly agree with you but.....Most people can't afford to go built all in one go until they are forced to get their ride back on the road because of a blown motor....or sometimes it just sits until they can afford it.
The usual bolt-on path is what most choose because you can get a decent bit of performance increase with a little bit of money each month out of your paycheck.
Eventually though, we all end up where we wanted to be in the first place and that is...with a built motor, so we can squeeze every bit of fun out of our trucks whenever the h ell we please without thinking about when it will blow!