But it wasn't ancient Rome, it was 1912. The Progressive Era, Oliver Twist, The Jungle... the reform mindset had already made its way into the culture. And most people today don't generally give a pass on slavery, especially in the 19th century, just because times were different.
No, but you can't single in on a specific aspect of the time period while ignoring the bigger picture. Things WERE different. While certain practices are not acceptable by today's standards, singling out people that were behaving according to their cultural norms (and not being negligent/evil as compared to that culture) doesn't accomplish much. Slavery = bad, everyone's on board. Not hard to look back and identify the 'bad guys' as opposed to those that simply were a product of the time, though. How much effort do we put into discussing the evils of, say, Thomas Jefferson?
How bad are WE going to look in a hundred years, compared to whatever passes for morality/standards then? Bunch of racist, classist, sexist, homophobes. Driving around poluting the shit out of the environment despite having the ability to do better, and killing thousands of people on the roads every year. In 100 years, I'm sure they can point out the obvious things we were doing wrong...
The way the abandon ship procedure was handled, even if there were enough seats so that it was 1:1 with passengers, you'd have still lost hundreds of people.
But 1:1 was still likely to save more lives than a lower ratio.
And 5:1 would have saved even more, but no one's advocating for that being the reasonable number. Why not an entire lifeboat per person, so everyone can ensure that a boat doesn't leave without them?
Disasters like Titanic were the experience that led us to understand how this works. Prior to that, they just didn't consider it would happen like this. It won't/can't sink, it'll take forever, there will be plenty of time to shuttle everyone to safety aboard another ship or land, etc. Obviously disproved all of those BAD assumptions that night, so we went back to the drawing board and came up with better. Since these things hadn't even occured to them, how can you fault them for it?
Doors that open outward to let people escape a fire seem obvious, but the people who installed doors to open inward (or rotating doors) weren't evil/negligent for doing so. It just took some glaring examples to highlight the huge flaws of that design, understand why it happened, and make changes so that it didn't happen again.
Titanic was the big game changer here. If it was the 2nd or third big disaster and changes hadn't happened, you'd be right to be all over them. As they were the ones to prove the flaw, hard to whack them for not planning for something they didn't think could happen.