Why does everyone think Classical Music is "sad"???

Every time i get on a piano where there are people, and i play classical songs, they always say "Do you know anything less sad?" and its infuriating, i even had a lady come up to me once and put her hand on my back and ask "Are you ok? Do you need to talk?" Like Huh????? im playing fucking Liszt. (I was playing Hungarian Rhapsody no 2 at the time this happened, one of my favorite songs, and she interrupted me to ask this too)

Has anyone else encountered this?