Charlie should be allowed to die. Treatment may make his condition 'less dreadful - there is no cure. A future cure would be too late for him. People need to realise it's not like the 'flu.
The parents cannot be objective. We are hardwired to nurture, love, etc if Charlie can be kept alive in GOSH for longer to allow them to settle from the trauma of it all, they will see more clearly.
I say this as the parent of a son with severe disabilities who died in his sleep at 18. The health issues and treatment took their toll. I was devastated when he died - we loved him, protected him, nurtured him, cared for him every day and night, thankfully we put off residential care. We slept with him in hospital where he was sedated and ventilated to name him 'comfortable.
When he died, I cried and kept saying 'He'll never suffer again'.
We had another son two years younger and we used take turns going out or doing things with him. We didn't mind this as it was the only family life we knew. We had some respite. One summer we had two nights, ie one day! A few times we had a week. We were grateful for this time to breathe but never completely happy at care away from our guidance.
Anyway, enough said. I have seen treatment first hand and it's heart breaking.
Poor Charlie.