need a variety of food to survive?

It’s not true.

Boredom feels terrible while it lasts, but it doesn’t kill you. In the end, humans usually start to get creative after boredom.

Oh, and yes, some food industry has found out things and told you things… yes, they were creative :-)

What about the British? They were starving, and they didn’t get creative. They just kept eating brown goo for centuries.