You might get imlied odds in some cases. But the times you don't, (or the times you chase a flush when you flop the draw, or second pair, etc) you considerably damage your stack. One of the most important things in a sng is preserving chips until you can get your money in with the best of it. The more chips the better.

I sued to think along the same lines as you, but after experience I can say that playing alot of hands early is simply not worth it. Majority of the time you fold postflop and slowly chip your stack away.