In reply to bouldery bits:
While, obviously, being appreciative of the Mountain Rescue organisation and its helicopter facility, actually walking in the N Wales mountains when the helicopter is on a mission, training or actual rescue work, is, soundwise, a pain in the ears. It's a consequence, I think, of there simply being many more people in the mountains than there used to be 10, 20, 30 or more years ago. So the accident rate has gone up ands there are more rescues.
A helicopter's sound travels as it circles over a spot and no-one goes to the mountains to listen to helicopters. But they are necessary for rescue work and yet they spoil the mountain experience. I wish they weren't there. I wish they weren't necessary.
Currently the USA's Yosemite Park has restricted entrance. Its website text says: " A reservation will be required to drive into Yosemite National Park from May 20 through September 30, 2022, for those driving into the park between 6 am and 4 pm. Driving through the park will also require a reservation if entering between 6 am and 4 pm. The temporary reservation system will help manage congestion and provide a quality visitor experience while numerous key visitor attractions are closed for critical infrastructure repairs."
Is Snowdonia providing a quality visitor experience for climbers and walkers? Are the walker+climber numbers too high? What is too high? Should there be a limit? Who would set it? Is this, basically, a set of unanswerable questions? Lots more people want to share the mountain experience, visitor numbers will grow and helicopters will fly. Suck it up.