Indeed. Technically, cardstock comes in different qualities, and with different parameters for various applications. Greeting cards, brochures, trading cards, diagnostic tools, and often, requirements can be extremely specific. Paper products are serious business.
I have never referred to my cards as cardboard and meant it literally. It’s a joke because cardboard broadly holds a cultural association with worthlessness and trading cards themselves have no innate value. Calling cards cardboard is affectionately tongue-in-cheek, not an actual factual claim.
Right? Isn’t that what everyone does? Isn’t everyone the same as me?