I agree this is total BULLSHIRT. We are living in the former Soviet Union or The Matrix.
From Tucker Carlson interview 11/03, Craig Allen a lawyer for the families points out that there were supposed to be all kinds of exits at the concert but that the exits were blocked. Another piece of information is that Allen says that there were two other off duty police officers from MGM on the floor responding to Campos, prior to the shooting, which he claimed towards the very end of the interview.
https://m.youtube.com/watch?v=P6ysvTVpKMU