His right shoulder isn’t even close to his head. There’s an accidental head clash in there but thats all, nothing illegal whatsoever.

There’s the perfect picture at the point of impact on Richard Silverwoods twitter account. Shows exactly how it happened, pretty much bang on.

But if you go in for a big tackle, and accidentally clash heads it's still a yellow. It's the tackles responsibility to not do that.

Exactly, if you go on to put a big hit it’s no longer accidental contact to the head. It’s reckless. So still 10 minutes was right.

Incorrect. There is nowhere in the rules where an accidental head clash is even a penalty, let alone a card.

I must admit I have never seen an accidental head clash penalised let alone a sin bin offence.

Contact with the Head in a tackle. It's not actually an accident if it's an upright tackle.
An accident is when two players come together when neither expected the collision.
Yaya hit the tackle aggressively and it looked like a great tackle to me, but if he makes contact with the head it's careless and a bin.

Nope, thats not what the rules state. For it to have been a penalty he would have had to lead with the head which would have been a red.

Did he not lead with the head?

Pop Tart, there’s a tacit acceptance within the game that accidental head clashes happen where no one is at fault.
Rugby League is a high speed intense collision sport and accidental head contact is an inevitability
The search for someone to blame when this happens is one of the things that’s killing the sport as a spectacle. Even in this modern game where they’re trying to sanitise everything there’s still a level of discretion in the officiating of a match and those Referees who truly understand the nature of the game will use that discretion well.
Officials who know nothing of the game other than the rule book will always be on the wrong side of that discretion and will frustrate the players.

I don't particularly disagree. Accidents do happen and in this case I thought it was a good tackle.
I haven't watched it back on TV yet.

But the RFL are trying to clean up the head knocks in the game and they say that if you try to do a big ball and all tackle, you have to do it without hitting the head.

If Max ducks into the tackle at the last minute I'd say it was an accident.
If he doesn't, and there is either contact with the head or shoulder.....then it's the responsibility of the tackler

And if the tackler goes low and the ball carrier steps causing the defenders head to collide with the hip bone of the attacker (a regular occurrence) whose fault is that?

Of course that's an accident. The disciplinary certainly take that into consideration.