Savescum is a core mechanic in Larian games. The Divinity games are full of encounters and events where the only practical way to not get your ass kicked is to savescum & cheese. For example, in DOS2, there's a dungeon where all the monsters are level 18. Walk through a certain door, and a scripted sequence plays out where your whole party ends up stunned and in a vat of acid. All your magic armor gets burned off, and your party gets hit with status effects, before you can make your first move...against a five-man enemy team of level 19s. Damage and HP scale exponentially in DOSII, so the difference between 5 level 19s and 4 level 18s is huge.
The only way to bring that fight's difficulty down from near-impossible is to know this will happen, break up the party, have only one party member go through the door and get thrown in the acid, then have the rest of your party sneak in, tiptoe around the fight while it's still in its first turn, find a secret passage, go to the end, release an angry level 20 dwarven queen, and wait for her to engage the enemy before joining the fray with the rest of your team.
It's not cool. It's stupid. Yet, this is the kind of "highly tactical" and "rich" gameplay Larian is praised for. 90% of the game is base around your party getting absolutely buttfucked without any warning, the only practical way to survive being to savescum.