You have an event.
Your event needs stuff.
Sometimes, that stuff needs more stuff.
You want to add in some fun stuff.
You might even need a place to put all that stuff.
And you need more stuff to set off the stuff in the place that is storing all the stuff.
You like specific stuff but need help finding the stuff you like.
You want opinions from experts who know their stuff.
You need someone to literally sweat the small stuff and help lug the big stuff.
The stuff needs to be expertly installed and carefully torn down (often in the middle of the night).
All this is so, in the end, you can just enjoy the stuff.