Let’s apply these arguments to other unhealthy habits.
Smoking is not nearly as unhealthy as being overweight, which is why being overweight should be a complete dealbreaker.
Overeating is a filthy disgusting and selfish habit. You are ruining your life and your kids lives when they lose their mother to heart disease.
The yeshivos and seminaries should teach that it is important to value life, and that one should never even consider someone overweight.
I do extensive research to find out if the person was ever overweight, and I make sure they are telling the truth.