You can use the computer to check whether you are doing the right thing by trying it out, but the computer will not tell you whether your program is organized i

You can use the computer to check whether you are doing the right thing by trying it out, but the computer will not tell you whether your program is organized in the best possible way, whether it is to be considered beautiful or not, or even, sometimes, whether it is efficient enough. To achieve all these points you really have to think, and it is just like building anything else, from texts to mechanical devices. Of course, its not abstract modeling; there is a necessary amount of technical knowledge to it, but so there is with anything else.