I personally have no problem at all if spotty Rodney from Burnage, who'd father is a doctor and whose mother has a degree in astro physics but now stays home to run the house, picks up a guitar and starts to sing 'the blues man'.

He might turn out to be good, he might turn out to be rubbish. No one stays the same for ever.

Say one person in every hundred who picks up the guitar turns out to be OK at it and one person in every hundred of those who get to be OK at it turn out to be very very good at it, somewhere along the line there will be a spotty little wannabe who turns out eventually to be even better than Sun House. (At least for some people)

Is it just possible that Sun House knew this and that's why he was so grumpy?