Seems quite simple to me – should the FC be putting public money into the 10% of riders at the "top of the tree" who we'd class as enthusiasts?
Personally, I think that there are areas where that is thoroughly appropriate, where the plan is to provide something that will provide a year round stream of tourism money into a rural area, successful examples of which abound, or to fulfil a niche for riders.
At the same time, theres a huge number of people out there taking their first tentative steps at mountain biking, who don't want or need radikal skillz and full on trails, that can come later – for the moment they're just glad to be trying out some nice pleasant singletrack – for them its a big step on from sustrans trails and riding round the local park, it builds their confidence and breaks down the barriers of feeling that the countryside is a scary intimidating place to be – hey, maybe some of them will enjoy it and take it up more seriously, buy a nice bike and venture further afield (making customers for all the B&B's at the 'destination' trails)- some might even explore and learn to read an OS map rather than follow waymarks.
Just think of these trails as fertilizer to grow the mountainbikers of tomorrow! 😀