Driving to work, that's an accident waiting to happen. Consider all the poorly signed roads, drivers of various states of sobriety and rage.
The sub was in use for years, they did well to engineer within their budget. There's always someone pointing out something wrong, nothing would get done if you actioned every single 'concern'
> someone [...] single concern
"That spring, more than three dozen industry experts sent a letter to OceanGate, expressing their “unanimous concern” about its upcoming Titanic expedition—for which it had already sold places."
More than three dozen someones. More than three dozen concerns.
Language also has a subtext that expresses more than just what the words mean.
Perhaps this wouldn't have been possible on their budget... But I think I'd rather have no sub than a sub full of dead people.