It's not logical to draw that conclusion. You've made it according to your own bias.

A claim that a miracle occurred can be falsified. But that only says something about the person who made the claim, not about the existence of god.

By their nature, most 'miracles' are impossible to falsify. For example, a person visits Lourdes and shortly thereafter is cured of her disease. Or a believer prays to god to win the lottery, and then does. It's impossible to prove that these 'miracles' didn't happen. All we have are alternative explanations.

People pick and choose among those different explanations according to their bias, not by way of proof.