By the fact theres not a thread about the penalty on the cas board they seem to accept the decision was correct all apart from the odd numpty anyway.

If McGoldrick doesnt swing an arm at his head its a try so the ref had no decision to make for me.

Spot on! You can see why he swung it too. High tackles like that have been missed by refs in the past so he had to chance his arm and hope for the best. Sinfield could have missed the kick as well. Either would have been better than a try.

IMV he swung high because he'd been wrongfooted & so his only recourse was to try to dislodge the ball, but as often happens when that's the aim his arm starts on Danny's shoulder & ends up smacking him on the chin & cheek with the flat of his hand.
Clearcut penalty.

I think there were plenty of "clearcut penalties" that weren't given. Look back at the recording at the 2nd PTB from the scrum at the end (one PTB prior to Chase's attempted drop goal) and see where Peacock and Clarkson are stood in regards to each other........

CLEARCUT PENALTY..............

Does this mean you agree the correct decision was made with regard to the McGuire/McGoldrick tackle?

So why does that negate one that was?
What about when Ferres in an offside position dislodges the ball from Hall's hands & you got the scrum?
Or the countless times both sides weren't square or onside at the PTB, or was that only the Rhinos too?