Well, I agree that non-professionals probably should avoid writing anything complicated, as there is a high risk that they will make bad mistakes. However, tha

Well, I agree that non-professionals probably should avoid writing anything complicated, as there is a high risk that they will make bad mistakes. However, that IMO does not mean that it's not good for essentially everyone to have at least some basic knowledge of programming and CS basics. For one, communicating your needs to a professional is also pretty costly, especially so when the task at hand also needs specialized knowledge from your own field (be it that communicating the requirements is a lot of work upfront or that the project in the first (few) round(s) doesn't end up doing what you expected it to do - not exactly unheard of in the software world), and secondly, even if the problem that you need to solve is too difficult for you to solve with your basic knowledge, that basic knowledge might still be very helpful in communicating the problem to the professional, as you might be able to see what kind of information the professional needs in order to help you. Plus, it might allow you to better select a good professional - the risk of hiring someone who isn't actually all that much of a professional is pretty real, after all, so adding to the costs of not learning and doing it yourself.