Like:
Bad thing happened = The universe made it happen, not your fault
Forgetting to do something = Well there’s nothing I can do, my brain chemicals are dictated by the laws of physics
Like if I don’t keep using Determism as an explantion, my brain just 🤯💀…
It’s not weird at all. We all do this.
But…
If you do it ALL the time, you’re not accepting any responsibility for your own actions. You’ll never learn from your mistakes or improve your behavior. Your brain chemicals may have let you down, but what are YOU going to do to prevent that in the future? What action of YOURS caused those brain chemicals to fail?
Yeah, expanding on this and to use one of OP’s examples: Sure, your brain isn’t an all remembering book, but that doesn’t mean you shouldn’t take active measures to improve on deficiencies. If you are forgetful, take better notes and refer to them when appropriate.
It’s an easy excuse for pretty much anything. Most likely an excuse to be lazy, because that’s where it comforts someone… Doesn’t mean it has to be untrue… Just that it’s easy to use it as an excuse for the wrong things.