To be honest, I talk like this too when I'm under duress or havent quite processed something - jumping from fragment to fragment to try and keep the whole in mind.

As my understanding of my day-to-day has increased and my work and life have somewhat settled, I'm able to better predict and summarize things that happen to me using my day-to-day as a stable baseline to reference from:

I can tell you the important bits because I'm aware of what the humdrum bits are.

I think my mum's world is way more stressful and uncertain than mine is, so her mind tries to capture everything because it has no stable reference to build from