Is development a poor work?

Some months ago, I thought that only fast implementation was important in development. Design and planning seemed to be more important. In other words, I thought that all things could be developed easily. But nowadays, I don't think so. Developing well is not easy. Someone may say that excellent hardware level can offset poor development. But I think it't not so. 

Large software is very complex. Controlling itself is very difficult. There could be so many issues. As project go head, you may not manage it more. Good design and coding is very important which depend on easy developer and architect.