I agree. This may not be the best analogy, but it should suffice.
Average Joe has a dead end job making 35 grand a year. He's paying the bills and has a nice savings.
He wants more and decides to invest his life savings and open his own business. Its a huge gamble, and would completely change his life. Either way.
He gets investors, finds a location and has everything lined up. Everything looks great.
Now, what could possibly derail this situation? Jane, Joes wife. She's happy with being a wife and mother and the way things are, just being a family and raising the kids and saving for their college education.
Joes plan is solid and ready to go, Jane should be on board, but she has the ability to turn it into a complete cluster fug.
Obviously I could detail this a little more, but I didn't want to make it too long and this should be enough.