Risks exist on a continuum, and something not literally being forcibly banned doesn't mean there is zero risk in that thing, just that the risk is lower than those things that are forcibly banned or that the risks can be mitigated in other ways.
Same reason you go through a metal detector to check for weapons before getting within half mile of a plane, but were left pretty much on your honor to not bring a Samsung phone with a spicy battery on board.
Europeans literally see no irony in throwing shade at Americans for hanging onto their traditional measurement system, while also speaking 27 different languages in the span of a few hundred miles.
Maybe come down off your high horse until you get that situation sorted, eh? >.>
Edit: Oops, I thought it would be safe to make a joke a in a meme thread.