That's on Nick's and the medical staff for getting it wrong. Not Lynch. They adjudicated Lynch fit after all.
We know that the reality is that all clubs trust the senior players to make the call as to whether they can still perform with the injury. He probably played well with worse afflictions as a 25 year old, but at his age it's time he realised. Hopefully he does the right thing this week or if he doesn't, he's dropped on form. Injured or omitted, it's his call.