We must assume that there is a drinking ban as there is a feeling that it affects people's performance (it definitely does for me!).
The other 6 players had a decent defence that it didn't affect their performance. They could apologise, say it won't happen again, but it didn;t affect them that much.
Hock unfortunately didn;t have that defence as it did affect him and he couldn't even make it out of bed to training in the week of the biggest game of the year!