loverdrive
your favorite gm's favorite gm (She/Her)
Sure, but there are ways to take a lot of control out of GMs hands when it comes to fights.If I'm running a game with tactical combat, it's fair to say I have an advantage over the rest of my group (with one exception, possibly). So I run npcs to their typical intelligence. Roll random for mindless up to cheating by having super-intelligent npcs knowing things they normally wouldn't. And I roll in the open.
But, the two times there were tpks in my games the past dozen years, no one felt worse than me. I do literally cheer for the players and celebrate with them when they get a hard fought win. I'm not trying to win, that's weird, it's very easy to win when you control everything but the PCs. It's much more fun and challenging to make it look like I'm trying to win.
Random encounters is a bit one. I rolled 2d6 goblins and I'm going to use them to the fullest extent.
Another important thing is making it possible to lose but not die. Objectives beyond "kill everyone" are great for that, but most robust way is to give PCs protection in the rules, like how concession works in Fate, or how you choose whether you want your character to die or not in AW.