Asisreo
Patron Badass
They're certainly different playstyles, aren't they? Either way, Rages are a LR resource of itself so you obviously can't Rage every encounter, or you're assumed to not use them every encounter. Until level 20, the maximum amount of rages you get is the expected minimum of an adventuring day. At level 3, it's impossible to get exhausted more than 3 times in a day from frenzy.That's exactly what I'd expect, and an adventure where you don't have it means it might as well have not existed in many ways (not all ways). Whereas iserith seems to be saying he can use it basically all the time and just con the DM ("player skill" as he puts it) into letting him not roll for stuff (sounds like he has a massively soft-touch DM to me, esp. as his Zealot has also never been killed, but hey whatever is fun!).
But you certainly aren't terrible without rage. You still get reckless attack, extra attack, unarmored defense, and danger sense without having to rage. You just have an option to push yourself further with rage and even further beyond with frenzy whenever the fight calls for it.
I've yet to play in a game where a barbarian seriously suffered for their frenzy because they just didn't use it on a couple of goblins when there's most likely a boss encounter later down the road.
Plus, people downplay how freaking fun it is to play a kaioken-type character that keeps pushing themselves recklessly. It's just a fun roleplay, at least to me.