Smiling may be one aspect of humanity, but it's not the only one. Protecting other people from disease and/or making them feel comfortable when they are around you are aspects of humanity as well. Maybe wearing a mask during a pandemic is more a sign of your humanity than smiling at people. At least it is something to think about.
There is a very big difference between making someone feel comfortable over legitimate concerns vs. non-legitimate, something that I must admit appears that the entirety of the left no longer understands.
As an example, if I am in a senior living center, which I often am nowadays, wearing a mask to make the residents feel comfortable would be legitimate since they are the ones most as risk of dying from Covid. I may not agree that the mask does anything, but in this situation, I can have sympathy (which is not empathy) for this concern. If I am dining in a restaurant where all of the staff and patrons are under 50, as was the case last night when we dined out, wearing a mask is not a legitimate concern since no one there is of a high enough risk of dying from C-19 for it to be one, and I am not one to give into lunacy just because everyone else is.
We do not stop driving just because someone on the block is concerned about dying in a car accident, even though they are 30 times more likely then to die from C-19, yet we are suppose to change the entire way we live over something that is a lot less dangerous then driving.
This idea that we must sooth anyone over any concern while not only not taking the time to see if the concern is warranted, but insisting that if you even consider this notion then there is something morally wrong with you, is ridiculous. It is what leads some to make such stupid comments like intent does not matter or insist that micro-aggressions are ruining society even if the person does not realize he/she is engaging in them.
This is nothing more then overly empathetic persons giving too much into their feelings just so they can say that they are morally good while throwing their logic out the window. In the end though, no matter how morally supreme you think you are, not following logic and reason will end hurting the people you are trying to help more then to be empathetically defunct yet logically sound.