Yep. The BCB is too lenient when it comes to the leaves Pybus is taking. Even during Law's tenure, SL would take a trip every now and then.
And yes, regarding the players' fitness, there is only so much a trainer or a fitness coach can do. If the players don't give a damn about their lifestyle, nothing can be done. Perhaps RP or the BCB can step right in and lay down strict rules or impose harsh punishment.
Eg. ECB has done it with Samit Patel and he has considerably lost some weight compared to 2-3 years back.
Get in shape, get picked. Else, spend your time eating mountains of Biryani on a plate with your other half.