Life is always going to have its risks, and trying to make people more "secure" doesn't always do that. Rather often enough, some of these measures to try to make things "more secure" actually increase risk of death, injury, damage/loss or otherwise lead to an otherwise avoidable outcome (as with what the security door did with regard to this week's Germanwings tragedy).

There are often people who want to spend huge amounts of money to try to prevent extremely rare, proverbial black swan type events while failing to appreciate the risks in and around their house/neighborhood/workplace that are far more probable. Aviation security measures seem to get a lot more and more intensive public mindshare space after a flight crash than drowning prevention measures get after drowning deaths.