This is not a secret. Here is a regular article for UX designer requirements, and under number 4 we have:
UX writing
Writing is the unsung hero of UX. People speak highly of coding, which is a skill that shouldn’t be dismissed, but writing is a talent that can be nurtured over less time to create brilliant user experiences. Pick up your phone and look at any of your apps and it will be filled with perfectly crafted words.
https://bit.ly/3cnEkuoIn this point in my 20 year career as a designer I simply refuse to comply.
You cannot create long term value for your customers by shifting the focus of design from the user to the product managers and shareholders.