Its a basic housekeeping. If something sits unused then its logical to clear it. Seeing that its been unused for over 2 years its fair to trash it.
Think what you want but all of us would benefit from little housekeeping. Especially you seeing that you created something just for a simple purpose and then pretty much stopped using it. Can't expect any company to keep it for you forever "just in case".
Be sensible here, please.
If it was security motivated they would tell people accounts with 2FA and recovery emails are not going to be deleted. I want to believe it's genuinely motivated by security alone but it's Google so I'm automatically going to take the cynical view.