Except that if I do not buy a ticket, I am not losing anything but the possibility of winning the lottery. If I do not fight, I am losing the fight. Buying the ticket is gambling, fighting when someone is going to punch you no matter what is not
Not true. You can always kill the enemy on a later turn, or your allies can kill him or numerous other things can happen. The only way this is true is if there is no option that does not involve chance.
You make the choice to attack every turn. When you make that choice you typically give up a sure thing and gamble that the result of that attack on that specific turn will be better then if you did something else.
IF you choose to attack and miss that turn will be worse than if you did something else. IF you miss every single turn (admitedly unlikely) the fight will turn out worse for you then if you did something else every single turn.
It is a gamble. It just is. The odds long term may be in your favor, but that does not change the fact it is a gamble.