I don't think anyone has been brainwashed. Speaking personally, I think there is a time to lay the boot in and a time to have a positive outlook.
And we all have our guard up, nobody is getting carried away, its more people being cautiously optimistic.
Trust me, if we get 6 weeks into the season and its the same old 5 hit ups, give it to Ben. Pathetic defense, players blaming each other for tries conceded, then it'll be back to laying the boot in and outrage.
For now, I'm embracing the hope (foolish as you think that is).