> Why should others with wider screens leave space on their screen empty for your sake?

Because "I" might be older or sight-impaired, and have "my" font at size 32, and it actually fills "my" (wider than yours) screen completely?

Would you advise me to "fix my eyes" too? I'd love to!

"Why should I accommodate others" is a terrible take.

I would advise you to buy one of these: https://www.dell.com/en-ca/shop/dell-ultrasharp-49-curved-us...

80-column line lengths is a pretty severe ask.