At first glance his expression does not look troubled but the tears falling from his eyes tell another story.
Always an interesting balancing act; capturing your little ones in distress versus giving them the comfort they want. No judgement here. I have experienced the same tension with my kid and my camera many times before.
If the camera hadn't been in my hands at the time, I never would have gotten the shot. Needless to say I only got one shot off before I had to comfort the poor little guy