The debugger is worth it. It shouldn't be the first tool you reach for, but it shouldn't be far from second.

Amen. For me the biggest problem usage of the debugger is when people use it as the weapon of first resort, without taking the time to reflect on why they need to jump to the debugger.

The only think I'd add is that if you are continually reaching for the debugger then it might be time to reflect on whether there are ways you could introduce a few less bugs (e.g. spend more time refactoring your code for comprehension/maintainability, writing tests first, etc.)