> Why not take safety more seriously?

Because safety is a cost, not a feature.

Air travel and sea travel did not get safer because some companies got together and decided to spend a little money to advance society. Ships sank and planes crashed frequently.

Things got safer because governments took action. Look at the 737 MAX. The cause of the crashes wouldn't have been investigated and Boeing wouldn't have fixed their plane if governments hadn't taken action.

At scale, companies do not value human life, so regulations add costs to change the incentives. Otherwise human life is just another tragedy of the commons.