To extend the analogy, Congress hasn't had their balls removed, they simply aren't humping other dogs right now.
I'm not an expert, but while many of SCOTUS' rulings have been against the plain letter of the law, few of the decisions ruled out Congressional power in those areas categorically. Congress could pass a new Voting Rights Act, or redefine the EPA's powers over wetlands, or any number of things, they just choose not to. And of course, even with a Democratic Congress, getting past the veto may be impossible.
I'm not an expert, but while many of SCOTUS' rulings have been against the plain letter of the law, few of the decisions ruled out Congressional power in those areas categorically. Congress could pass a new Voting Rights Act, or redefine the EPA's powers over wetlands, or any number of things, they just choose not to. And of course, even with a Democratic Congress, getting past the veto may be impossible.