I think people tend to choose the more unique/recognizable name to call candidates by. For example, we also call Bernie Sanders by his first name more often than his last. “Harris” is a more common name than “Kamala”. “Clinton” could be confused for Bill, but “Hillary” isn’t going to be mistaken. I don’t think it has anything to do with the candidate’s gender.
As a family that tries to cook as many of our meals as possible and generally visits the store once a week, it can be a big endeavor. To make balanced, healthy meals for the whole week requires a large variety of ingredients. This makes meal planning before the trip and having a list necessary, and then there’s a lot of searching for things that may not always be in stock.
Additionally, we often restock household necessities and toiletries on this trip as well, which requires more planning and a longer list. Add all this together with carrying all the bags, putting things away, etc, and it can be pretty exhausting.