I already know all those things and learned them for pleasure. Once you know it, nocode vs code is like the difference between using a GUI with a mouse or learning the keyboard shortcuts and using the command line. GUI with mouse just slows you down and is less flexible in general. Fine for lots of things but it's hardly a substitute for complex apps. Nocode apps are basically approximations.

You personally know how to use Rails and a number of other web technologies relevant to building web apps. So this product is not for you.

Much in the same way that Home Depot is not for me.

I use nocode tools all the time, just not for building products. They’re great but they are also limited. If you hit any kind of success with your prototype you have to be ready to do it for real.