The biggest hurdle for beginners when using built-in IDE debuggers in my experience is the requirement to set up the debug run configuration to properly execute their program. Even though this amounts essentially to "how do you run the program on the command line? Write that in the IDE configurator", newbies don't know how to run the program from the command line (and can't debug any startup errors they might get), so can't properly set up the debugger in their IDE, and revert back to print debugging everything.