NO, THEY, DIDN'T.
It's an impossibility to totally eradicate risk from any start up business. I'm sorry, maybe this sounds rude, but anyone who thinks differently is absolutely deluded. Zuckerberg faced having his entire business taken from him in a court of law. He settled instead. Pretty risky behaviour in my book. Surely there was the risk he'd spend money and time on a great idea that someone well connected with much deeper pockets got wind of it and blew him out of the water before he really got started?
I think you are confusing risk being present to managing the factors involved in said risk so as to minimise or exclude impact from the risk in concluding your goal.
For example. I am sat on one side of a gorge and Penelope Cruz is sat on the other. Because she is smoking hot I really want to be on her side of the gorge and the only way is to jump the gorge as there are no other ways around.
So the risk present is trying to jump the gorge and not making it or stacking it in on the other side so as not to impress Miss Cruz with broken limbs and gushing blood which would obviously hinder in the copulation (my goal) I so desire.
So the factors that may affect my successful leaping of the gorge are going to be things like speed at point of take off. Actual distance I need to cover. Wind resistance or hitting a helicopter full of Chinese sight seers that are taking a tourist trip and fly out of gorge and of course gravity.
So my mate, who has the same goal as me runs and attempts to jump the gorge. Unfortunately he really did not put any thought into how the factors affecting his flight path would affect him and he falls into the gorge into the helicopter full of tourists and gets turned into red mist by its whirling blades.
I take sometime to calculate that gravity will immediately impose a 9.51 meter per second per second acceleration the very moment I leave the ground. Quickly doing some math in head I work out cover the 20 meter distance I will need a ramp at 15.8 degrees of slope and a velocity 10.7 m/s. This will mean I cover some 32.9m not taking the wind into account. I can tell from dropping a blade of grass the wind speed is less than 30kmph and will exert a maximum negative force vector impact of 5m jump distance. This will mean I have 7.9m of spare distance in case some other vector I have missed affects the jump attempt.
So having assessed the situation I buy/invest in a motorcycle from the harley dealer that happens to have a shop on my side of the gorge. I fire up the bike and due a test run to 40 kmph and all seems fine. I know I only have to reach 38.52 but decide to err on the side of caution.
Penelope has heard the noise from the bike and is watching with great glee enticing me to I start my approach. She is jumping up and down in anticipation of the spectacle. I see this jumping in slow motion as I am concentrating on the factors doing a mental check list before I commit. I have forgotten about the pesky helicopter. I quick glance down into the gorge and it is nowhere to be seen.
So everything accounted for I start my run, hit the ramp at exactly 40kmph and let physics do the rest. A short moment later I land successfully on the other side and soon am achieving my goal with the of course impressed Miss Cruze.
So yes there is risk in absolutely everything. Entrepreneurs, well at least the good ones, identify and manage the risk.
Sorry for the long email but I have to go now. Penelope is calling me.