Why does it need a field for location and email?

https://en.wikipedia.org/wiki/Gecos_field#Format

https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/4/html/introduction_to_system_administration/s2-acctsgrps-files#ftn.idm140081194521120

What are you getting at me for? You asked a question and I answered.

I don’t care about any new gecos fields because they’re optional.

Because back in the 60s and 70s, people wanted to know whose print jobs were running and where the printed documents should be delivered.