I see what you're saying. It isn't too much of a bother to me, but it is a nice "break" from my routine. Besides, I actually have fun buying presents for my family. I see how it can get annoying or too intrusive, though.
So trips doubling in time when you just want to go out any buy some food doesn't bother you?
When I said buying presents for others was fun, I was mostly referring to the part where they open them, not the actual buying process. That can sometimes get tedious.