Maybe one things missing: 'specific domain knowledge'. At least 1/2 of programming is learning. You can make a basic Android App, but have you learned how to d

Maybe one things missing: 'specific domain knowledge'. At least 1/2 of programming is learning. You can make a basic Android App, but have you learned how to do 'deep linking'. Well, it can take a full day the first time because it's awkward, and you have to understand a few things, and set a few things up server side. Second time - it'll take 1 hour. There's a lot of that. If you're really comfortable with XMLHttpRequest, and know the ins and outs of post/form structures - well then you can do something quickly in it. If you don't well, it could take a bit to learn for a new dev. Those things add up a lot. It takes several years to get comfortable with the variety of tools and tech necessary to be good.