I sort of liken it to cooking. I'm a decent cook, but I'm not a gourmet, 5 star chef. I do simple meals very well. I make a very easy but terrific chili, but rarely I will buy a canned chili. I've tried and tried to make a great spaghetti sauce, but NEVER have been able to achieve one as good as a certain commercial brand/flavor I like. it's a reasonable cost and takes a whole lot less of my time to just have that sauce on hand. And, so it goes with my eliquids, as well. Some are better bought.