do you think i person has to suffer for punishment to be effective ?

a few weeks ago my parents put me on lockdown for a weekend as a punishment for stealing from a shop, i was locked in my room at all times with a key, i had to be escorted to and from the bathroom , i had to eat in my room, i had to be up at 6am then after a shower i was locked in my room for the rest of the day lights out and bed 9pm, i had no tv no phone pc etc, i had to study and was set a series of essays to write including why its wrong to steal and another essay on unaceptable behavour and punishments, i found this punishment VERY boring and VERY unpleasent, my parents said thats the point of the punishment to make them suffer for their poor behavour and to deter future wrong doing WHAT DO YOU THINK ?