It's not a matter of forgoing unit tests. Example: rename a method to something more clear. It's used 1000x in your codebase. You can do that in probably 5 seconds and know that it's done correctly. It says nothing about how the method functions, but rather that the code hasn't suffered because of this trivial operation.

Another example: you want to abstract a chunk of code into a new method. Easy, select the code, refactor it out and provide a method name. 2 seconds.

You want to reorder the way the arguments appear in the method? 1 second.

You want to know if a variable is in use anywhere? 1 second.

This stuff is painful without an IDE. I don't know what you do in life, but I find this functionality indispensable.