In fact the QLP, in some halfling individuals, can manifest its influence in ways other than a reduced risk of catastrophically failing at a task.Says you. Not the Players Handbook.
Not D&D
Again. Says you. Not the Players Handbook.
What is Lucky? Mechanically negligible and − actually − flavorless.
There is no attempt in the Players Handbook to explore the possibility that Luck is magical or otherworldly.
Some of those individuals are able to channel the properties of the QLP to help prevent other members of their party from failing. (Bountiful Luck)
Some of them may force an enemy to fail at an attack when mundane 5e physics says that attack should have landed. (Second Chance)
No human, since they don't possess the halfling's QLP, may benefit from these unique properties of the physics of the D&D world.
Nope!And there could be human explanations for it. Like a culture that pays attention.
Obviously, these little gents and ladies are normal humans.