You're only seeing a part of the development task. Yes, the knowledge requirements for doing a task X (let's say a given CRUD app) are declining. But:
- How do you guarantee that all those pieces you just glued together will work with high availability? That they'll feel easy to use and consistent if exposed to the end user, or easy to maintain (future developers) and operate? Quite some work is often needed to have all that.
- User expectations are getting higher. You could get away with a certain quality and usability of software in 2005 that you couldn't today. Had a desktop software in 2000? In 2006 it was a desktop software and a website, now it is a web app, an iphone app, an android app...
- What you are describing is putting together a solution. Might make sense in many end user scenarios, web apps, etc. For things like automotive and other, low level programming is still needed - though abstraction is also slowly making its way in there also.