That doesn’t make much sense, as the paths originate within ostensibly secure areas.
It is, to some extent, all theater. This is designed to prevent the meatheads and dirtbags from bringing in their shootin’ irons, again either deliberately or by oversight, and not to foil any truly heinous acts. Meatheads and dirtbags are much more likely to be local and arrive by car. Having a visible security presence is going after that low-hanging fruit, so to speak.
EDIT: A more benign secondary explanation is that it’s also about finding contraband. Resort guests probably won’t be toting their own booze (and I realize the deep, deep irony in yrs. trly. saying that), where as underage, and dirtbag, locals might.