The people in the picture are so used to working with assembly language, that even though they know the average person doesn’t know much about assembly, they assume the average person knows a little, which is already way more than the average person actually knows.
I speak fluent x86, I've been writing xor eax, eax before rax was a thing and you had to wonder whether you shouldn't be using xor rax, rax (you shouldn't), I figured out how to write linux binaries in pure assembly before arch was a thing, just don't throw sse or something arcane like aaa at me. But damned if I know a single opcode.