Earlier quoted context omitted.
You say that now, but once you actually are in such a position and you realize that you could pay off your college debt plus your mortgage in 2-3 years, things might change in your mind.
When you count on that bonus that came last year it could mean that mortgage goes under. Making a lot of money is great until it doesn't come for whatever reason.
It should go without saying that you shouldn't take out a mortgage where you can't afford the regular payments out of your regular income. Banks are very unlikely to grant you such a loan anyway.