Aside from that just being plain wrong, depending on who you include in "every single person": And that's a problem. Milk production causes lots of GHG emission

Aside from that just being plain wrong, depending on who you include in "every single person": And that's a problem. Milk production causes lots of GHG emissions and is generally quite resource-intensive. (And also quite cruel for the most part, but apparently that argument doesn't count for many.) We would do well as a species to reduce our milk consumption.