I guess that attitude comes from the fact that I've always had to buy my own cake in life. My parents provided me with food, clothing, a place to live, and other "necessities". They never bought me a laptop, a cell phone, a car, or any of the dozens of other things that teenagers seem to feel entitled to these days.
Fine, and good for you. Opportunities aren't uniform, though, and there are students who don't even have those necessities you mention, and have to work for those. I likewise was fortunate to have the opportunity to make my own money at a young age, and so I don't begrudge you that. What I take exception to is the implication that all students have such opportunities, are aware of them, and enjoy the familial stability required to exploit opportunities as they arise.