Replacement power button iPhone 6s Plus

Why does the Power button on the iPhone 6s Plus break?

Just think how many times a day do we press the Power button? This number is almost impossible to calculate because this button is multifunctional and participates in many operations, for example, we use it to: turn on / off the iPhone, lock the screen, take a screenshot, and set a melody. Since it is used in so many operations, then, accordingly, its resource is rapidly decreasing, it is the resource of work that is one of the reasons for the failure of this button.