Just a simple thought process that seems to slip past some players. Easiest example I can give is going into a veteran story mission. If you’re relatively new to that difficulty, and you walk into the first few enemies and instantly die, you probably won’t have much more success walking into them a second time after being revived. After a bit of leveling up veteran enemies are manageable but there’s no point burning through all of our lives at level 1 because you went in to get obliterated or you went in to revive the first guy despite seeing him get obliterated and not dealing with the threat first.
The same can apply to PvP too, but I’m too lazy to give an example, and I only thought of making this while going through a veteran story mission where we lost all our lives early to a few players, the two players who couldn’t respawn just gave up and left while the remaining 3 of us played smart and blasted through the mission. I’d like to say I didn’t die at all but I somehow managed to pull off some sort of tokyo drift on the edge of the map and my allies weren’t nearby to revive.