I dont know, this is literally what beavers do. I think you are really selling the beavers short here.

I mean they've been evolving and being naturally selected to optimize for this specific activity for eons.

You wouldn't expect the government to be better at making honey than bees? Better at swimming and catching fish than a dolphin? Better at making silk than silk worms?

If I was going to be #2 at Dam building I'd want to be #2,to beavers.