I don't know about most rugby fans but I do know that I've stopped going to internationals because of it. To be fair, the live spectacle was always a lot harder to follow than footy anyways - you've got no chance of seeing what's going on in a scrum or maul, but the crowd doesn't know when to cheer now. When something happens or when the TV ref approves it. It seems farcical to me.
And as for the argument that it would help the players behave... How exactly? That was not a problem that rugby had to cure. The players never gave the ref any shit pre TV replays because they'd be sent off. That's all football needs to do, send off a few moaning bastards as soon as they opened their mouths and the whole thing stop virtually overnight. Nothing to do with TV replays, it's a simple matter of punishment.
The other thing is, I reckon a lot of football's appeal is down to the fact that it all happens to so quickly and later on we can feel like we got a lucky one or we got robbed. It makes for most of the talking points. It is unfair, it relies on quick decisions that can go either way, and it mirrors life perfectly. I'd argue it's why many billions more people round the globe love it over rugby, which is another very good reason for not taking any tips off a comparatively minority sport.
People mentioning the massive screen that everyone could see. Have you ever even been to Anfield? We don't have one. The majority of people who I meet who want technology aren't regular matchgoers. They just see the injustices replayed 30 times on sky, but when you're at the game you see it once like the ref and take a view. Seconds later the game had moved on and it's done. I personally love that. If it had to stop all the time it would kill it for me.