If you fail at mid or jungle, you get crucified. If the same happens anywhere else, they just assume you'd bad.
The expectations for a mid laner, especially when you called it, are much higher than other laners. Let's face it, people's expectations for support are really really low. Maybe it has something to do with being a support main, but I consider it the least stressful role.
I personally found myself transitioning away from mid last season, after being completely unable to play it on a regular basis. A very large chunk of my S4 games were support and top lane. And right now, I don't really feel an urge to play mid lane.