you do know that this is in reaction to the walking down the street video, right?
Because men are expected to show their happiness in ways other than smiling.
As someone who has been chewed out for not having the proper amount of enthusiasm in his voice when responding to a friend announcing his engagement, I can say with certainty that men do get told to appear happy. Just because walking around with a smile isn't part of the standard for men, does not mean that we aren't expected to put on a front for the world, or that we don't get called out for failing to put on a socially acceptable mask. Asking women to smile is actually very similar to telling men to not cry. We expect both genders to fit certain expectations for appearance. Smiling is one for women, looking "strong" is one for men.
It is a problem that so many feel that they have the right to tell strangers, or even friends, what type of emotion that they should show at any given time, but that doesn't change the fact that it is often "normal" and done with good intentions. It's a social system that has been built up over time until it has reached the point of being a problem, but that doesn't change that people doing it are not necessarily aware that there's anything wrong with their request, because it is perfectly "normal" within their experience to expect people to fulfill the roles within society, even if those roles are ill-fitting.
For fucks sake. Pay attention in a Sociology class, people.
Are you saying that men are harassed to show their happiness by strangers on the street?