Tell them to write the software themselves. Then, when they say that they can't, tell them that most of the rest of the world can't, either. There's a reason

Tell them to write the software themselves. Then, when they say that they can't, tell them that most of the rest of the world can't, either. There's a reason that it's a specialty. Whether or not you are as good as an expert does not matter. Whether or not you are good enough to do the job that they can't do for themselves, does.