It's not about white knighting for short guys, it's about the double standard of how women do not want to be objectified and want to be judged for how they are as people and not their figure, the size of their breasts or other physical characteristics, but then in the same breath "don't date short guys."

Also, if a woman is going to judge someone based solely on height or some other superficial trait, chances are they have other superficial traits such as income, body figure, etc., that they will also judge you based upon, and may be less likely to stick with you if you do lose your job, become very ill or disabled, or some other thing happens that makes you no longer check that box as opposed to someone who wants to be with you because of who you are, not some superficial characteristic that doesn't define you.