> It's about making people feel safe.

I don't think that's a common perception of airport security. Few people take reassurance from it, most consider it a burden and hindrance that could stop them getting their flight if they don't perform the correct steps as instructed.

The lifting of this restriction is an example, the overwhelming response is "oh thank goodness, now I don't have to pay for overpriced water" and not "is this safe?"

I disagree. It is a burden and hindrance, but I'm pretty sure that if you just removed all the checks and let people board like in a bus, there would be complaints.