Launch costs?

I know you guys have addressed this and I just don't get it. If
launch costs aren't the problem, what is? Everywhere I turn I see
the major impediment to routine space operations (well beyond what we
have today) is the cost to reach LEO or GEO. If it's not launch
costs, what is it?

Also, is there a good site with tutorial on launch costs and factors
affecting them and the like? Or a book I can buy (somethine
like, "Launch Costs for Idiots")?

Thanks in advance for any information.

Jack