True....two important facts-
1. Smith and Andrews and others KNEW that the ship would sink. Smith should have given clear orders to the officers and crew to insist, at the point of rudeness, of getting people to the boats AND filling them to capacity. The lackadaisical attitude was inexcusable.
I'm not (and no one else is, either) certain what Smith himself was doing during that first hour. It is know that he spent at least part of that time surveying the damage, but there's a point at which no one knows what happened to him, and its a time that occurs after the iceberg and before the ship sank. Cameron dramatized him standing on the bridge -- which is I supposed possible but I think he'd have been noticed. I wonder if, experiencing his first-ever loss of a vessel in more than 30 years at sea, he didn't just shut down in some way. What I see in the overall failure of the "lifeboat drill" is a lack of leadership from the top down. This is akin to what we saw in the recent wreck of the Concordia (I think I have the name right) near Venice. There was effectively no leadership in that incident, either, and if there'd been effective command, probably no lives would have been lost.
Certainly more people from the Titanic could have been saved. Some of the early lifeboats left the ship with fewer than half their seats filled. There could have been actual crew assigned to clear and manage the collapsibles -- what you saw was an ad-hoc effort by some crew and a lot of passengers. Lightoller, the senior officer to survive, did so by getting to Collapsible B, while it was upside down, and organizing the people standing on it to preserve its flotation. If they'd had the sides up, and gotten both collapsibles upright so they would float off in good order, another 70 lives could have been saved.