Is International selection optional?

I personally find it difficult to understand how a player with a fractured eye socket can deselect himself from the England team playing against the Exiles and less the 48 hours later can run out for his club team.

I know the medical team of England are involved with withdrawals due to medical issues but how is that injury healed enough 48 hours later to allow a full contact game?

I also understand the club have a right to player their player as they pay his wage.

If this has been a player decision then surely the consequence should be further omission from the International side at the end of the season.

I know this potentially weakens the English team but equally sends out a strong signal about the privilege to be offered an English team shirt.

What do you think? Am I too harsh in my criticism? Let me know you thoughts...