Why do people hate jury duty?

Matthew Yglesias can't understand:

When I did jury duty in New York years ago I read The Brothers Karamazov while waiting around. When else do you get the chance these days to tackle the big honking 19th Century novels? Is everyone else's job really so amazing that they can't bear the thought of a few days off to listen to testimony and pronounce on a verdict? I don't buy it. I feel like as a society we've coordinated on a pointless anti-social norm that you're some kind of sucker if you're willing to just smile and do what the judge wants even though there are no really good self-interested reasons to want out. For salaried professionals, jury duty is a paid vacation. What's not to like?

Josh Barro thinks he has the answer:

It’s true that many salaried workers can go to jury duty without losing pay or burning vacation days. But is it really a “paid vacation”? That depends on the nature of your job. If you’re just one interchangeable cog in a corporate or government machine, maybe you can sit on a jury and let your workload fall to your co-workers. But for a lot of salaried professionals, jury duty means being at the courthouse from 8 to 4 and then going into the office to attend to a slew of matters that only you are equipped to handle.