peteblue
Welcome back Wayne
The point they are making is that the openings onto the dock road aren’t particularly wide and there aren’t many of them. That is the whole point.
No mate, there will be more than enough space to exit. 50,000 people do not approach the openings at the same time. They have to get out of their seats first and make their way down various stairways to ground level and the exits, then they have to walk from whichever side of the ground they are on all the way around to the wall. It will be a steady flow of people besides those that tend to hang around a bit to have a pint….