If you personally chose to claim to be agnostic it might be due to laziness, but that’s not fair to everyone else to assume that because you don’t comprehend their own spiritual journey.
I think people who identify with being agnostic have actually arrived at a place that requires a lot of maturity. They are finding peace with the fact that none of us are so informed as to KNOW for sure what governs the universe. We can all be pretty damn sure in our own minds, but that’s faith. They are being humble enough to say “I don’t know if God exists or not, because no one does, and I’m at peace with that.”