Back in the late 80's and early to mid 90's I was into other crafty things. I also had space at a flea market promoting my designs and heard alot of the same comments you did.
About a month later I asked myself "what is wrong with this picture" and decided since everyone made comments like I can make this myself I got myself a state business license and started buying the materials for them to buy so they could make it themselves.
I had a sign up that said "So you think you can make it yourself......I challenge you to buy the materials to make it and I'll give you my pattern for free". I made a killing all those months selling beads, string, yarn, plastic canvas, needles, stones....you name it I had it.
An NO not one of them that bragged that they could make what I had made came back with a finished product. LOL
But I sure sold alot of craft related materials.