OK.....let's remove semantics from this. Whether anyone can agree whether close ups are macro or not is semantic as it relates to the difference between iPhone 13 and iPhone 13 Pro.
I do fully understand people have an expectation that iPhone 13 should be able to focus (using the OP example) 8 - 10cm from a subject. To be as clear as possible, iPhone 13 is INCAPABLE of doing that.
On the other hand, iPhone 13 Pro is CAPABLE of focusing that close. And Apple calls this Macro Mode. A feature iPhone 13 lacks and CANNOT have.
I hope that is clear enough for you? No one is getting worked up here. Dogcow and a few others of us have tried to explain the difference between the two phones, whether anyone understands, we can't help with that.
Since this answer is clearly not the answer you want, take your complaint to Apple. They designed iPhone 13 and 13 Pro. They decided what features each phone gets. They decided the Pro models have more features and better cameras than iPhone 13. As such, the Pro models cost more and do more. One usually get's more if one buys a higher line product. To expect a Mercedes C class to do all the things a Mercedes E or S Class does is never going to happen. And that is the case with iPhone 13 versus iPhone 13 Pro. You decide which features matter to you and you purchase the device which best meets your needs.
Ps: The grass felt nice. Thanks! :-)