Modern Stupid

It says:

Myth: Thomas Edison invented the light bulb.
Fact: Thomas Edison merely invented a way to keep it turned on.
Me: So, he invented the light bulb, because what use are they, if they don't stay turned on?

Myth: Lemmings commit mass suicide.
Fact: Lemmings don't commit suicide, they just explode in population, and end up dying on their migrations into oceans or over cliffs.
Me: Then lemmings commit suicide, because nobody's going to say a Rodent can have an existential crisis. What exactly are they doing, following each other to their deaths? And why do you think the metaphor works in the first place?