When learning feels "too easy"

Do you guys ever have trouble when a scientific fact feels "too easy" to understand? I tend to get paranoid about my own confirmation bias, and feel as though I must just not be thinking hard enough about ways it could be questioned or falsified. I don't think there's anything to this sort of paranoia, it usually goes away with time as you begin to see more and more indirect evidence and also as you apply the concepts, I'm just wondering if I'm the only one that gets this.

i sure get stuck with one theory for countless hours thinking i might be too stupid to see the real picture.

Happened quite many times.