There is no way around it: Valentine's Day is a “Hallmark holiday." For those of you who are unfamiliar, Hallmark is a greeting cards brand that has been churning out the corny, pre-packaged sentiments since 1910. The company, which is based in Kansas City, Missouri, is the largest (and oldest) manufacturer of the products in the United States. You don't have to be based here to understand that “Hallmark holidays” are commercial creations. Hallmark started shilling cards for Valentine's Day in…