matoshi on Nostr: In my opinion, the main reason for running my own fullnode is: The moment I connect ...

In my opinion, the main reason for running my own fullnode is:
The moment I connect my wallet to a 3th party node, it will search all my addresses for UTXOs. So the node operator can link all these addresses to a single entity/ IP address. I don't even have to do a transaction.
Or am I missing something?