Itunes says my OS is out of date, but it's not.

apple.com/itunes refuses to launch for me and tells me that my OS is out of date, but I'm running Ventura 13.3.1 and my updater tells me that my MacBook Air is up to date in all software, including Ventura.

Since I can't update (because I am up to date), and iTunes won't work unless I do, I have no access to iTunes.

That can't be right. How am I supposed to give Apple more money so I can access content?