Why can application developers do datasebase stuff but database developers try to stay clear of application stuff?

Question

In my experience, this has been a contentious issue between "backend" (database developer) and "frontend" guys (application developer, client and server side).

There have been many heated pub discussions on this subject.

I just want to know is it just people have different mindsets, or lazy to learn more and feel comfortable in what they know, or something else.

Answer 1

I might re-phrase the question: why do (some) application developers think they can do "database stuff" without actually bothering to understand it properly? Whereas database developers do not (in general) assume they can write a good application without some training and experience!