One day of coaches/players telling you what it is to be a husker isn't going to do much. The pride that ex players talk about is literally from being there all four years and buying into a program. 4/5 years of walking around the weight room, the trophies, the people, the reminders of the past that truly bring out a lot more pride.
Ya, lets just do nothing so they have no understanding to build on while they are here. Kind of like how we start kids with advanced math before teaching them how to add and subtract. Makes sense.
I truly hope you don't believe the coaches don't do anything to tell these guys about Nebraska both while they are in school or before.
The recruiting process is literally there to tell the kids all about Nebraska, they don't just go for a visit out of the blue. They are told about the blackshirts, the history, all the bells and whistles to get them excited to come to campus. On their visits, they walk them all around the facilities see the names, the pictures, trophies, etc that they've been telling them about for usually months.
The addition and subtraction part of your advanced math theory is started well before these kids sign and come to campus.