Sure, you can have a huge number of people cheering you on, but that also makes people make stupid decisions just to please the crowd.
This is definitely the case during professional Poker, especially on the low limits tables when you see inexperienced fish showboating for the crowd.
I've seen people go all in without looking at their cards just because they've had a good beat, only to get completely ruined seconds later.
If you are a pro, a crowd is a no-go.