As an outsider, I'm just surprised to find out another weirdness of the US system :) I have no congresscritter to contact.
Around here if an agency is regulating something it also has the power to impose changes and/or fine. Those can be contested in court but involving the legal system for years isn't the first step.
They often do here as well. It’s just very situational whether they have the ability to levy a fine directly, force action (e.g. the FAA can decide that an airplane is unsafe and they’re immediately grounded), or sue. Consistency would be nice, but every time someone proposes changes they’re going to hit industry opposition unless there was just a big failure, at which point they’ll probably try to let it go forward enough for the initial news to fade and then water it down.
Around here if an agency is regulating something it also has the power to impose changes and/or fine. Those can be contested in court but involving the legal system for years isn't the first step.