Hi, one big benefit is that the debugger will show you what values are being passed into the check (so it will show object + activity/plant etc).
Using the debugger certainly isn't a replacement for code review but should be seen as an additional tool with some of the benefits already mentioned. In the same way that SU53 has it's place 'vs' the better info in ST01, debugging can give benefits over code review. There is a time & place for all of the tools.
Cheers