No, it's luck. The stat sum of a ranged attacker's kill on the first night is always less than zero, and therefore, their contribution is obviously negative (they are harming the team with this action). However, this doesn't take into account subtleties, such as shooting at inactive players, which in the long run can "stir up" the town and increase the chances of winning, and so on. But without all these considerations, the stat sum is still negative. If a ranged attacker guesses and kills the mafia, it's not their merit, but rather random chance, which, despite the player's demonstrably incorrect action, led to a positive result.
You probably don't understand what luck is in this case. And you would definitely consider such a scenario as your own merit.
Ничто не возникает из ничего и ничто не пропадает бесследно.
Если где-то чего-то убудет, то в другом месте добавится.
(Закон сохранения).