Can you win any secenerio ?

[Oldbones]

I have been playing for just over a year.
 It is brilliant and I really enjoy playing and my opponents are great.
When playing a new game, and I pick the scenario , I always struggle to find one that I am happy with as far as balance goes.
I look at the stats and then try and pick a game that's well balanced.
 Then if I play and win one I have chosen, I feel bad because  of it.
I have bee told, you must always think you can win, and that every scenario can be won by either side.
 That all depends on the opponent's playing ability and the strategy and tactics they use.
So can any scenario be won by either side?