oooooh it's all about the utxo!
thank you very much, your answer helps me a lot to understand 

Hi,

I'm kinda new to this crytpo stuff and I wanted to start a bitcoin core node to understand more.

I understand that it needs to synchronize data (taking days to do so) but why ?

Knowing that there's a prune option making so not all data are stored on my computer, why couldn't a new node start with info validated from the last blocks ?

Unless I get it wrong, its purpose is to validate future blocks based on a previous/last one right ?