/u/KikiCat's right.  They're crazy if they think viewers want to look at a slovenly neckbeard.  They'll just turn the TV off.  That's why they don't show the fattest hoarders (yes, there are fatter ones than the "Tiny Monsters" episode) on hoarding shows.  Even in the South, local weather newscasters aren't tubby porkers.  It's not hard to put the fork down compared to all the other requirements for the job.  You can't just waltz on into a studio and say "I'm a meteorologist." It's possible that obesity is more common for the female hosts, but we can only speculate.