That’s one side, but they do cause a lot of environmental damage as well.
In general, beavers cause damage to human resources by 1) gnawing on trees or crops; 2) flooding trees, crops, property, or transportation corridors (roads, airports, railways) through dam building; and 3) degrading and destabilizing banks and levees through burrowing.
I’m guessing those things are caused by the conservative beavers, not the liberal ones, right?