Why make it so difficult to see the royals?

I have been reading how there are going to be many opportunities for the public to see Prince Charles and Camilla during the royal visit this week, and we are being encouraged to attend events and greet them. However, I have also read about the numerous traffic diversions and parking restrictions that are being put in place at the locations where the royals will be. My question is why bother to ask people to come out to say hello to the couple when it seems nearly impossible to do so?

Read Auntie’s answer and comment on CNS Local Life