This really shouldn't have to be explained, but when a camera is on someone this much, it is bound to catch poses like this and worse. Yes it is bad optics, but it can't really be avoided unless you are conscientiously focusing on every single movement. Then, you could end up self-obsessed. Pretty much anyone who waves at crowds can be caught in that pose at some time. I think that's one of the reasons Churchill, during and after the war, always gave the victory V when waiving at people as he was aware waiving wrong could easily be caught on camera and give bad optics.