If that is your argument then men have equal potential to be beautiful, and you are making assumptions about my motives instead of analyzing what was said. logical fallacy. As constructive criticism (instead of avoiding and assuming anyone who has something to say about your writing is ugly, which is not a very rational approach) perhaps you could use the term inner beauty, because that is not how it came across at all. Maybe replacing beautiful with "inner beauty" and not making it gender specific would get across what you just mentioned you are trying to get across. Also, the tone and the context (though I assume you don't mean it now that you have clarified)came out as saying all these useful things and then going, oh and girls, just make them feel beautiful. It comes across as very minimalizing in my opinion. You may not feel it is important, but considering your entire article is on getting people to like you, you may want to consider how you come across to people, and assuming that anytime someone thinks you come across the wrong way is because THEY have issues instead of seeing how YOU can improve yourself, if one of the top things not to do, especially in a startup.
And lets say I'm totally wrong and being super sensitive, guess what? A lot of people are like that, especially in the workplace, so if you want people to like you, then you need to be able to understand and adapt your behavior to accommodate for other peoples sensitivities, even if they aren't yours. I do that with people of different cultures, religions and political opinions all the time. I feel that you should be the champion of this if you are writing articles about getting people to like you. Please use this information to empower yourself and learn even if you do not agree, instead of putting other people down. Other good rule in business.