'The Office's Meredith Defends John Krasinski's Sexiest 'People' Title, Says Haters Need Glasses

John Krasinski is People magazine's 2024 Sexiest Man Alive, and some people are pissed about the selection ... but one of JK's pals from "The Office" is firing back. Here's the deal ... John graced the cover of People on Tuesday wearing a T-shirt…