You could fish in a lake that only has one fish in it, and you would have an opportunity for success.
Yep. And just like with hunting, even if the lake is chock full of fish, some won't catch any while some will catch plenty. On April 18 there will be holes in trout streams positively loaded with fish and yet some will walk away empty handed.
Opportunity is all we are entitled to. After that it's up to us.