I don't think there's anything inherently wrong with cynicism. It definitely serves a purpose, as you point out.
The problem I see is that OPs tend to receive a reliable and sustained torrent of cynicism, and little else. Sure, there is value in those comments, and often super enlightening exchanges, but the default attitude of being the smartest-guy-in-the-room can get exhausting and counter-productive. Oftentimes would-be worthwhile discussion get buried or passed up for a bitter exchange with both parties just trying to prove their intellectual worth and cleverness.
The problem I see is that OPs tend to receive a reliable and sustained torrent of cynicism, and little else. Sure, there is value in those comments, and often super enlightening exchanges, but the default attitude of being the smartest-guy-in-the-room can get exhausting and counter-productive. Oftentimes would-be worthwhile discussion get buried or passed up for a bitter exchange with both parties just trying to prove their intellectual worth and cleverness.