Unfortunately it is a LOT more effort to put a beam at 70 ft than at 25 ft. I doubt that you'll ever have more than a tiny fraction of active hams who have 70 ft towers. That's just the way it is. It doesn't help that the VHF and up bands come alive during contests and then go dark again. Obviously anyone who can work me during a contest could work me any other time, but they aren't there. It appears to me that most VHF+ ops are primarily contesters. Nothing wrong with that, but it limits the utility of VHF SSB for those who have liked to rag chew.