Good point. It could be a stepping stone for future National riders to see what its all about. I don't see any negative in it unless they start to clog up the trail.
Maybe some NATC guidelines on how to be a good minder, trail manners, might be needed to instruct the newbies.
In Golf everyone is entitled to a caddy, not just the good players. They paid their entry and have just as much right to be there as anyone.
....and if the PROS ARE WORRIED about being slowed by them on the trail then maybe they shouldn't WASTE 1+ hour Dicking Around at the first section!