MLM Downline Builder

My question is to anyone who understands adult psychology. Why is it many people seem to constantly complain about not having enough money but seem to have no interest in Network Marketing or anything else that might change their quality of life. Would they rather just complain or honestly look at doing something that does not require thousands of dollars of investing, but only requires thier time and energy? I dont get it. My parents were very successful business owners and always told me that in order to be successful you have to do something that no one else is willing to do, so maybe I am on to something with my MLM