If the tanks just blow stuff up from long range, are careful where they go and return when out of ammo then they won't lose. Maybe a few tanks would be destroyed because of traps but not all. But if the bowmen got other weapons beside bor and arrow then they might halt their advance.
Personally, I thought Avatar's Ewok reinactment was retarded, so I think you are missing my point. Once again, you are assuming the empty field
If a bunch of bowmen are hiding behind a hill while tanks are pounding from long range, nothing is going to happen. And besides, you are creating a strawman argument in which tanks have no vulnerabilities, which they obviously do.
And so you see my point right? That bowmen CAN defeat tanks, but it isn't likely. Cavemen with Clovis tools could beat a tank if they are lucky enough or have enough advantages stacked on their side. Personally, I would find it unrealistic if bowmen had no chance at all to defeat tanks. It doesn't offend me if they do actually suceed, in fact, it will be remarkable and exciting. No, it would not be exciting if Bowmen beat tanks all the time. Let's look at it from the perspective of a football game. Let's say one team is so behind that onlookers ascribe the losing team only a 1 in a thousand chance of winning. If they make a come back and succeed, do commentators throw their hands up and complain about randomness? No, it's remarkable. It's special because it doesn't happen often. Yes, the team that was ahead will be angry, but its these occassional improbabilities that make almost certain defeats exciting: there's always the chance of an improbably come back.
I don't see why people refuse to accept this. I think people are failing to understand what probability is. I think people tend to ignore the 99 time that they defeat a bowman with tank, and then throw a hissy fit the one time they fail. That, or they are crappy Civ players and ignore the fact that they are attacking bowmen when they have extraordinary defensive advantages. A 99 percent chance of victory doesn't mean that you will always win, and if you lose, that doesn't mean that the "forces of randomness" carry the day. It just means that you caught the sore end up probability for once. Accept it.