You can get 10 in the bin for illegally holding a player and preventing them having an opportunity to get to the ball and score. And that's probably fair. To suggest that a relatively equivalent penalty is reasonable for that tackle is ridiculous.
And sorry, but what mitigating circumstances?
Sua'ali'i made no attempt to tackle and stop Walsh passing or running the ball. That hit was purely about smashing Walsh. I could have some sympathy for NSW's situation if Walsh was slipping while trying to pass - you know, while he still had the ball - and the incident happened while Sua'ali'i was trying to wrap him up. But that's not what happened, so f**k the merkin.
Oh dear, here we go again.
Look at the tackle in slow mo.
The contact was intended for torso/chest and wasn't a classic side on shoulder charge and at the last frame Walsh loses his footing and bingo, it's not rocket science.
If you've played the game, especially at that level, it's near impossible to tackle lower at pace on an outside shoulder. Try it one day. I've played rep footy and what I'm telling you is fact!
The only thing Joseph could have done is slow the tackle down so he could adjust if Walsh slips. In SOO that doesn't happen. Your expected to rush in at times.
The solution, play touch footy with noone watching.