But his relationship with Alfred was that of a son and his adopted father and with Robin a father and his adopted son.
I don't see how people could think otherwise, at least in the modern age of comics.
Because people in general are silly, immature creatures who like to see things that aren't their, and then convince others that it's true to make a point. There really isn't a point to make when you ask them what the point is, as long as it's made.
It's called attention whoring.