It isn't doing any harm
It creates unhealthy expectations.
If anything its inspiring people to better themselves and look better. I don't see how that would negatively impact society. The kind of people who read these magazines aren't really the kind of people who would expect that of others. ie Guys wouldn't normally read a woman's beauty magazine so the "unhealthy" touchups wouldn't affect their expectations of women.
By printing these pictures it gives impressionable teens an unreal image to strive for often pushing them to diet extremes, anorexia and bulimia, and cultivating self hatred. It is an often times unattainable view of beauty. No one is perfect so why pretend we are?