You clearly haven't spent much time on reserve. If they called every day and had us fly a plane and sent us home I think most people would be happy with it. What people hate is when they call you for a 5 day TDY somewhere and have you sit there not flying when you could be at home. Reservists also hate when they're called at 4am and released into rest for a 4pm show time so they can fly until 2am. When you refuse it they threaten you. They also like to assign 7.5 hours of RDY multiple days in a row when everyone knows they have no intention of having you fly.

I was called out for a maintenance flight once and they kept asking me to be there as fast as possible because the captain was already there. I told them I needed 2 hours. I actually got there in 1.5 and asked where the captain was. They told me at that point that they actually had no captain and the flight was canceled, but now since I was at the airport anyway I was going to sit 7.5 hours of RDY.

If people got called out to fly a plane every day they wouldn't be complaining. People hate the sleezy tricks crew support plays on the pilots and the fact that they TDY you all over the place just because they feel like it and can't stand to see you in your house getting paid for it.