This topic has been done to the death on other forums. There is no such thing as a genuine or false MTB experience. Natural riding has it's place and so does a trail centre which is why they are so popular. We spend all year riding the peak district, local woodland trails, flat xc rides etc but normally have a few days in Wales away from the family specifically at trail centres as it offers something that we cannot regularly get in my location. The trail centres offer carefully thought out, built and managed days out.
You have snobs looking down on people with cheap machinery and you have reverse snobs sneering at those that can afford high end bikes but can't ride well.
Just let people buy what they want to buy, ride what and where they want to ride. It doesn't matter one bit.