The point of view of this article: The situation mentioned by subject is quite normal. This is a warm-up program with a cold car and high idle set by engine management system.
First of all, this situation is mainly designed to ensure that water temperature in engine reaches engine's normal operating temperature as soon as possible. At same time, a suitable operating temperature can also make oxygen sensor and three-way catalytic converter come into service as soon as possible, making emissions more environmentally friendly.
Secondly, earliest carbureted engines used a manual throttle cable, meaning throttle cable was pulled by hand for adjustment. It mostly depends on experience of driver to judge if it meets hot car standard. In later period, it has been gradually switched to water temperature control thermal spring to adjust throttle. Now it is all controlled by computer, which is more accurate, so that situation mentioned by the subject is perfectly normal. If this situation does not occur, then there must be a problem. . .
I hope my answer helps you.
The above is just my personal opinion, feel free to comment/subscribe/like/.