Slaughtering a village for the evulz and just to see what happens is murder hobo alignment, not evil.

You‘re putting examples against each other that cannot be compared. Let‘s take the village overrun with monsters and present it to three different characters of each alignment. The good one fights the monsters to free the village. The neutral character assesses the risk and if they don‘t fight, they at least inform the next village they pass through. The evil chatacter doesn‘t bother because they don‘t care.