There are good reasons

people don't make feature length films on their own. We are stretched
to our absolute capacity now. Trying to get through the footage we
shot, the footage ASO and Versus shot and schedule retrospective
interviews to shoot MORE footage. It's daunting, overwhelming,
frustrating and downright abominable. There are usually entire teams
of people to handle the promotions, computer/tech issues,
communications & scheduling, funding/accounting, travel, legal,
research, writing, editing and and directing. We are 3 guys.

Needless to say we're a bit Gripped.