Not specific to Django, but:
<opinion>
A debugger is just another tool in the toolbelt. It’s not magic and it’s not a silver bullet.
Personally, I think it’s more important to know how to use one, and to understand the information it can provide to you when trying to diagnose problems.
You can then make an informed decision on a case-by-case basis as to whether it’s going to help you or not.
It’s a whole lot better to be in the position of “I don’t need to use a debugger here, I understand what’s happening in the code” than to have to say “I don’t understand what’s happening in this code and I can’t figure out how to find out where things are going wrong.”
Learning how to effectively use all the tools available to you is part of one’s personal development as a programmer. This transcends all other considerations of language, framework, operating system, etc.
</opinion>