I buy information because I want to save time. I could cobble together a bunch of free resources on the internet and go through a bunch of trial and error or I could just pay someone who already figured out how to do it and laid the process out step by step. 

You can acquire years of accumulated wisdom distilled down to only the necessary information for pennies on the dollar compared to the time, energy, and money it took for them to acquire such wisdom. I will take the trade every time.