That's unnecessarily alarmist FUD from a decade ago that has nothing to do with today.

Windows 11 installed clean with support drivers has only minimal Lenovo items:

- Lenovo EasyResume Service - enables a grace period before hibernation

- Lenovo HotKey Client Loader - makes the special keys work

- Lenovo Intelligent Thermal Solution Service - fans go brrrrr

- Lenovo Platform Service - (not running)

- Lenovo PM Server - power management coordinator

The only other thing is their user-attended updater, Lenovo Update Service, that doesn't run in the background and doesn't do anything uncommanded. It finds driver, BIOS, and firmware updates. It's optional and you have to install it yourself.