Almost as shocking as you going to a restaurant that's actually open!
I never would have thought to check if they were open on Sundays. I just figured they were. When I checked their FB page to see what time they open so we could plan our day was when I found out they were closed.
No. One is far more shocking than the other.
Strangely enough, I go to restaurants that are open nearly any time I want to. The difference is that I am not disappointed when one is closed - I just find someplace else. I spend no time obsessing over which restaurant I need to visit six months in advance. If I go and they're open, I'll eat. If I go and they're not open, I will find someplace else to eat.
Surprisingly, it's not that complicated.