People have been altering their appearances since, well, let's just say since man discovered how to make something in his semblance. That's right. Ever seen Venus of Willendor? Diskobolos? Byzantine icons of Madonna and Child? Paintings of Queen Elizabeth I? Hollywood portraits since the 30s? My goodness - the outrage at the "lack of authenticity" of a picture is august, but this is in no way a new concept. I am not declaring that use of Photoshop is right or wrong, but manipulations of the image have occurred for [literally] thousands of years.
Human beings have always wanted more, wanted to "improve," and the perception of beauty has evolved numerous times. Claims that all "rounder" individuals lead healthier lives than "stick-thin" people is an incorrect assumption (as is the similar vice-versa statement). Commercials are commercials because they are meant to SELL. They are meant to appeal to a large consumer base (and while you may not be one of them, many others eagerly volunteer in your stead), which is one of the reasons why they keep making them in the way that they do. Entertainment is for your amusement, so that you can revel in the imaginary lives of others who are just that much more exciting than you and can fly (yes, that includes Batman AND Superman, among countless others).
Commercials, commercial entertainment, entertainment, entertainment commercials - is it not obvious that these do not reflect the absolute truth? Yes, these are not 100% accurate representations of human beings. What a revelation! Maybe you should stop wearing cosmetics and those trendy clothes. Start documenting every mundane aspect of your life like those poor, grammar-and-spelling-skill-deprived souls of social media sites so that everyone will know exactly how "real" you are, and how "real" your five minute walk to class was.
I am so very grateful for our easy and immediate access to a plethora of information at our fingertips, but it baffles me how some particularly ignorant individuals still manage to exist. Feel free to have an opinion, but be informed about it; at the very least, admit your weaknesses and be open to learning.