The beavers are still there, just not in high numbers like they used to be. Right now the ecosystem can only support the population that is already there. Maybe eventually it will support more and then the number will increase naturally.
Which they never will on their own, so surely conservation regulations need to be enforced, too bad the US is moving backwards right now in that regard
Then you get people (understandably) upset that just about any work they want to do to improve their own private land needs to involve the EPA and/or a local wildlife commission.
> But beavers can only thrive if landowners allow them to.