Ya but blaming other user groups is a lot more fun.
Besides politicians don't want to get involved in any redirecting of present land development.
But you could argue by what rights does a land owner have to negatively impact a river? Does he have the right to stabilize the river banks bordering his land?
Presently here in Oregon a land owner does indeed have that right.
That's why nothing ever happens, nobody wants to make the hard decision.
And fish recovery suffers because of it.