Jolteon

That really only matters at higher levels of communication, not the barebone basics that we’re talking about here. When we are referring to 1, 2, 3, etc., we’re not referring to our ASCII representations of the numbers. We’re referring to literal pulses or some kind of other countable thing. While sending what a layman would call a simple message would be difficult, the kind of simple message we are talking about is very doable.

And how did such a thing evolve in the first place?

I have a hard time imagining how such a thing could evolve. Making reproduction more difficult is literally the opposite of what it does, so it had to have been somehow worse to begin with.