I'm not wholly sure that the experience of the pilot is all that relevant.
What I see, is a pilot who clearly took off in acceptable SVFR weather, (otherwise he wouldn't have got the take off clearance) who claims that inflight weather was within his abilities and privlidiges, being asked to return to an airport with weather that was unacceptable?
Why would ATC ask someone to return to an airfield with unsuitable weather? Why ask someone to make an illegal flight into deteriating conditions?
If he had real concern for the flight, he should have sought to find an alternative airport with better conditions! He should never has sought to bring an aircraft into an airport with unacceptable weather conditions!
Yes, the pilot bears a certain responsibility for flying into cloud without advising ATC of the problem, but to focus on that, ignores the other issue.
dp