This is probably a very big part of it. Hiring a fat is a huge liability. It's a massive money sink on all areas. Fats need larger chairs, and bigger desks. They are less product (in general) and the first to get sick, or get injured. It is very easy for fats to get injured doing things that are normal for normal sized people. They are also really good about seeding bad blood, causing drama, and upsetting functional work environments with their attitudes, complexes, and mood swings. Google is really smart to not include them, if this is what is really happening.