I suppose the difference is you'd normally use a debugger to find out why the code isn't doing what it's supposed to, rather than using it to find out what the code is supposed to be doing in the first place.
Agreed, and riffing on that a bit — I find the name "debugger" is actually troublesome when teaching newcomers (I work with kids of various ages).
I see the debugger much more like a "REPL for a compiled language" than a "bug removal tool". I try to teach people to think of it as an interactive inspection tool, not as (merely) a thing to fix broken programs.
"REPL for a compiled language", or "Binary REPL", I like that.
Besides that, it's times like these when I realise how useful IDEs are. Instead of needing to use grep (or something similar), I can simply right click on a variable and choose 'Find all references' (this is in VS, but I'm sure many of the leading IDEs will have this feature). When I use the command line it's to save myself time.
You can save even more time by pressing Shift + F12. CTRL + - goes really well with it (step back to previous code location). I'm a bit biased toward hotkeys as I'm using the fantastic vim extension, VSVim, so I barely ever have to take my hands off the keyboard. VS really is a great tool. Adding the Docker integration for dotnet core has really opened up deployment options for what was once a Windows only product for deploying to Windows only. It's still essentially a Windows only product (I've heard the Mac version isn't comparable), but you can deploy and debug in containers. Dotnet core is at v2 now, and seems stable enough to actually use in production (finally!). On a tangent here, but the point is it's a good time to be working with dotnet.
I don't consider it abuse either, though.