We'll see what happens in real life with the pop-up camera.Everything will eventually fail. It doesn't matter if it is Apple designed or NASA designed. It is about working at expected usage life.
Now, for smartphone, it is about 3-5 years. If it is not fail within 3-5 years, then it is acceptable. For this particular phone, the camera can handle at least 50,000 movement. How many time do you need to have front camera pop up per day? This thing can easily last you at least 3 year. Also the front camera can handle at least 45KG of pressure before it snaps off. I won't worry about pop up camera. Specially, there is no notch on that phone.
You say it is bad idea, but I say it is good idea. At least someone is trying to find a solution for all screen phone without that stupid notch.
As you don't like the iphone x for various reasons, I see this as a worst case compromise. However, I'm glad you got a handle on the life expectancy of this.
I'll take the notch any day.