It is a weird sort of diffused understanding of responsibility (we all pay taxes and our representatives vote on whether or not we’ll do war, after all), but I think it is not that uncommon. Lots of people don’t seem to want to be unusually personally responsible for military applications, compared to their peers, I guess?
I think most people just feel differently about things they do directly, than they do about things they indirectly contribute to through taxes or just existing in the economy, and don’t put a ton of thought into it.