Why does the offset path generate new points?

Question

Adobe Illustrator

How to disable? It seems like this has never happened before. Can anyone run this experiment on previous versions of Adobe Illustrator?

Answer 1

No way, apparently under the hood, the representation of the circle in the form of Bezier curves is used

Bezier curve properties
...
it is impossible to create parallel Bezier curves, except in trivial cases (straight lines and coinciding curves), although there are algorithms that build an approximate parallel Bezier curve with practical accuracy.
https://ru.wikipedia.org/wiki/%D0%9A%D1%80%D0%B8%D...

you can just duplicate the circle and enlarge it.

Answer 2

Depends on the value offset the more, the more points