>>4638907 (lb)
not saying you're wrong: indeed there are plenty legit ways to say that while earnestly joking.
but that's coming from people who do not want to say such things for real, who mostly live unaware of the fact that there are people who do.
This ambivalence, the symbolism thrives on it, it couldn't live without it.
i'll agree it's not proof, in the classic sense, but it's there, for one to see and interpret as he can. from there, readings will differ, but to some it'll be quite obvious