Perfect memory would be awful. Every bad thing you ate, every relationship ended, every toilet visit, as vivid as when they happened? No thanks. Your brain keeps track of what it needs to, and while it’s not perfect (thousands of years ago, humans didn’t need to know where their car keys were), it does a decent job picking what’s important to store in long-term memory.
If you can, read Lois McMaster Bujold’s “Memory”. It’s about a secret agent who got a chip installed that makes him remember literally everything, and it doesn’t go well for him.
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