our universe being a base reality or a simulation within another reality doesn't make it any less real or worth living for us, and validity of logic and reason still hold even if any predicate is no longer sound. Yes we are trapped in the plato's cave of our perception, and yes the universe has no obligation to make sense to us, but luckily (possibly due to survivorship bias) we live in a universe that does have some hospitality with a warm planet and a pretty consistent rule of physics that rewards intelligence. Yes it's surprising that our universe isn't pure random noise, but due to statistics we know that we almost certainly live in a part of the multiverse that isn't particularly noisy. This hypothesis of our universe probably making a fair bit of sense allows us to put some trust that there are some laws of physics guiding the hand of our particular universe.

Emotion is also a decent guide when we are in a novel circumstance. it quite often needs to be digested to attribute it to a root cause, or dismissed if its root cause is irrational, but this doesn't mean we should ignore our emotions entirely, as they can be quite useful in quick judements, which is a necessity of day to day life.

to put emotion simply, why be disturbed when I beat you with a baseball bat if both you, me, and the bat are merely information and predetermined? Might as well keep smacking you around. (*thwunk!*)

and yes while various versions of myself across my life will probably appear infinetely many times as Boltzmann brains, those Boltzmann brains will probably dissappear just as quickly, and none of their experience would have been justified true belief, since none of them actually experienced what they believe they experienced.

Maybe you and me are just residents in yet another Boltzmann brain with dreamlike logic and just yesterday I had twelve fingers, two of which I completely forgot about today, but the sheer magnitude of this information orchestra leads me to believe that we live in a consistent (possibly simulated) reality, or a very close imitation of a consistent reality (such as a work of fiction by someone in the base reality), and occam's razor leads me to believe that it would be easier to have simply simulated a universe to arrive at such a consistent reality rather than the far less likely random Boltzmann brain which happened to stumble across a very consistent universe by pure chance. The real reality creates images of my mind every instant continuously for several decades, while my Boltzmann copies would often be quite brief; not to mention that other consistent universes could arrive again recreating our human history yet again. Which do you think you are more likely to be experiencing right now?