I suspect you are asking why Apple will not allow Beeper Mini to send and receive iMessages. The answer is probably Apple does not want non-customers to use iMessage or iMessage’s infrastructure. iMessage costs money to run and Apple is not interested in letting people who do not use its products use iMessage.

Humans. Humans are why we can't have nice things.

Personally nearly every nice thing in my life either is a human or was made by one

It's a bit redundant to mention "is a human" separately, since humans are made by... wait a minute

Reproduction isn’t really a human making a human. Where making means using your cognitive power to apply focus to a creative task. It is more akin to natural biological processes. Do humans make poo, or hair?

OK, what about IVF?

And every atrocity, driven by greed, envy or just sheer assholery?

Also humans.

Greed I’d argue, there are many that aren’t greedy but enough to ruin many things.

Oh, so we just kill all the humans, and then we can have nice things?

It's an option. Not the one I would try first, but sure..