Your argument here is really poor, you're comparing abuse of an official to assault of a woman. Here's the big difference, the official is directly involved in the game they're playing, and the punishment is to ban them from playing in a game for abusing its officials, not to put them in jail. That's very different to a domestic violence incident in private, or even just physical assault outside of rugby league, where the public judicial system will deal with him. If he/they actually physically assaulted a woman at a game, especially one they were involved in, absolutely 5 years, even a life ban.
They verbally assaulted and intimated an official who makes the game they're playing possible, if they can't respect the officials in a competition they're contracted to be part of, including them being representatives of their clubs (it's a rugby league game, they're rugby league players), then they don't deserve the privilege of being part of the game.
It's as simple as that.
And since you're certain of the outcome, please be my guest and tell me what you believe it to be, so we can come back to it once the decision has been made. Also, those wise and mature grown ups who don't knee jerk, handed David Fifita a year ban for a similar incident, so it seems the grown ups agree with those calling for the longer bans, at least on precedent.