I understand about the National Parks, FWS, Forest Service, etc wanting to recover some money from group tours, over and above the standard individual annual Parks pass or daily admissions, if the group is getting access to a normally restricted-to-public area, or is soaking up all the available spots for limited access to a particular location, for instance, blinds. I would imagine that the average tour goer would be willing to pay the admission costs directly or passed through as part of the package. I may start buying duck stamps even though I don't hunt, the stamps are fundraisers for NFWS as well as licenses to hunt. Is the issue that it is time-consuming and difficult to get that license? It does boggle me that a pro would not buy the license and pass along the cost to tour attendees. I, an amateur, try to be as nice as I can to the local rangers, not only because I appreciate their work, but because they pass along interesting tidbits about status of and location of wildlife.
All that said, I would not want the kind of tour where everyone lines up and takes the same photo of a landscape. Why bother? Working from the same blind - fine.