Run with whatever turns you on (or in this case debounces your thing - which may very well need debouncing if you're running with it!!!)...

In programming, there is no single correct way of doing anything - there's a zillion different ways of doing everything. Some more efficient, some less so, some you're comfortable with and work for you, so you stick with them...

You don't HAVE to use any of PICBasics commands... ADCIN, HSERIN, HSEROUT, HPWM, BUTTON are just a few that immediately spring to mind. If you know how to do basic Port I/O and know how to access the PICs internal Registers (if you don't then it's time you did), then there's no reason why you can't and shouldn't do so if you're that way inclined.