I find that people who have never worked at home before, do not understand what it takes to be successful. To be honest, I even had someone once tell me that working in a fast food restauraunt as a shift leader at 17 was "not a real job." I wanted to be all indignant with a retort that I have my own spending money or something like that but I, instead, chose to be tactful. It is all about opinion. While you can sit them down and explain in detail what it is you do and the revenue you can create, that can be taxing.
Personally, I just keep chugging along. They see that I am never complaining about bills being paid nor do I have to ask for help because my job provides benefits, W2, hourly wages and I have "business hours" or a working schedule. They will eventually get the idea or not.
Take no offense because people will often have the wrong opinion until someone like us educates them.