Why are people shocked Ferrari may leave F1 next year ?

This year they have not really been showing the Ferrari spirit , hardly any points lack of good driving . Now because of the proposed 40 million price cap they have announced they may leave , i think they are using the price cap as an excuse and don’t want to admit they just plain suck now that the rules have changed, the drivers have to drive not computers they and most other high end teams can not cope with the likes of Brawn GP . Ok Ferrari are like a huge team / money bringer in the F1 community is it just sour grapes or do Ferrari really want to leave because they cant spend so much money as they used to ?