If "lab tests" show game theory to not work as a predictor, then the scientists performing the test made incorrect assumptions. This does not however mean that

If "lab tests" show game theory to not work as a predictor, then the scientists performing the test made incorrect assumptions. This does not however mean that game theory does not work or is not useful. As far as I know, estimating player's ability to reason is part of game theory. The less rational the player, the more variance in outcomes. Game theory is still useful with less rational players because you can still exclude dominated strategies.