That's a good point, but applies to email accounts or other "addresses" (e.g., chat IDs). Here I am referring almost exclusively to accounts for services and random websites. In fact, I still have ownership of the cringe email account I created in middle school, despite the fact that nothing besides spammers is using it. But as you say, a missed service that sends you an email there, and your data is in someone else's hands.

For other services (say, signal username) there are other controls that prevent this issue, thankfully.