Divers have literally been complaining over 50 years to keep "the government" out of the business of regulating the scuba industry. Now half of you are complaining about how the USCG should have done a better job enforcing (more & better) regulations the Conception.
This point deserves to be addressed, though I don't think there'll be universal accord. The problem gets back to the old saying 'You have to take the good with the bad.' That's especially true of government. Another way of phrasing it is to ask 'At what cost?'
Yes, I wish liveaboards had been designed with at least 2 practically usable exits from bunk areas, at least 1 exiting to an outside deck space, and that if need be, the Coast Guard had ensured compliance.
Now the question then becomes, if the government's 'role' in the scuba hobby expands greatly, what else will they get into? At least in the U.S., 'government' is closely tied to 'bureaucrats,' and confidence in the latter is not high.
Recently there was outrage over a Malta case dealing with dive buddy liability, IIRC. In past discussions when Australia and France have come up, I've gotten the impression of regulatory overreach (by my standards). While not a matter of law, some influential behind-the-scenes types in Grand Cayman seem to've managed to largely prevent solo shore diving there. When someone dies in a Florida cave, thoughts quickly turn to fear someone will shut down diver access to that cave.
I don't think anyone supports the position there should be no regulation, but some of us are guarded about it.
Richard.