Your reasoning is not logical - there is more than one explanation for the tirade of subjective criticism levelled at plastic products.Water Systems said:Every time the topis is raised it produces a vast amount of post slamming it. If it was faultless you would not get this.
The people who doggedly insist that copper is the only 'proper' plumbing material appear to be very anxious - I surmise that they believe the growing use of plastic will make their skills less valuable.
The fact is that there is no single product that suits all circumstances. There's a time and place for copper, and brass, and plastic, and soldered, and compression, and pushfit. To refuse to use plastic is similar to believing that pozidrive screws are a new fangled gadget suitable only for the DIY market.