Kitchen Sinks - Should they be bowed?

Having lots of trouble believing there is any true reason to have a kitchen sink bowed and have to be spring loaded into position.

I remember a Moen Sink issue years ago that the customer had me install his sink over 5 times, each time Moen sent another one it was just bowed as bad as the last.

They finally sent a relatively straight one, job complete. He thought moen was going to compensate him for all the effort I made to go up there and replace that sink that many times, they didn't.

The guy was real hard to deal with and his poor wife, I felt so sorry for her.

This guy was a numbers guy, always headstrong to keep going forward no matter how bad the situation is. Thank goodness I don't work for him anymore. It's better that way.