Tools or Command Line?

I'm an Oracle DBA, and my perspective has changed in the last couple years regarding this issue. I used to always be more comfortable restricting myself to the command line tools to do my DBA work. For example, write the sql (or generate it) to create objects, query roles, etc. I always felt that to be marketable, I could not depend on tools that one employer may have, but others may not. However, for the following reasons I have decided to base my career more on learning tools--for the following reasons:
1. OEM tools are standard in most shops;
2. So much functionality has been pushed down into db processing that there is too much to remember, or even look up in references;
3. With productivity expectations, I can no longer keep up by using the command line for everything.

I would like to have other DBA's opinions on this issue.