Sometimes I’ve made a fight too easy so I need to provide the goblins with some backup.
Sometimes the backup was always planned after round 2 but maybe it’s a little less than I planned because they’re already near death. Maybe it’s a little more because they’ve killed most already. Maybe the party was stealthy so less backup. Maybe the party was overly loud so there is more.
Also sometimes the pause to “save” a character comes from determining/calculating if the action is “fair”. Why did they just take that “stupid” action. Maybe I undersold just how powerful this NPC was. But maybe I did describe them as having an otherworldly glowing set of armor and you watched them wrestle a bar full of orcs and slice off one their heads in a single blow.
Perhaps you’ve reached a point between player and DM where this isn’t necessary anymore, but I don’t fault anyone who might fudge a roll to keep the game fun.