I agree with you, Drew. It's also about choice, and being satisfied with our efforts. If we don't use the tools that we love, then what's the point of using them at all?
To me it's all about expression, to communicate something to others, about what I felt and saw. My chosen tools are not large format, (I tried that for a few years and didn't like it), but I take personal pride in the prints that I make, and because I spend so much time and effort trying to make that one thing perfect, it feels good to keep them, to show them, and sometimes sell or give them away.
I don't think large format is overkill, as long as you love working with it. That satisfaction trumps everything else, in my mind.