Having a wall of people to bounce a wide one off
Played in a senior open last year, they had spotters on 3 holes around where your drives should land, it did help twice and I must say it was a bit of a novelty having spotters to help.
But overall I don't think it would make much differance to my H/C.
Are they allowed to talk to you? I was once told that mine was the longest they had seen all day into the wind. I really did catch that one well on the way to a nett 72.