Because that's most people's natural resting face and we don't walk around worried about if that makes some rando happy or not. No one owes you the attentions you desperately crave.
Welcome to real the Portland. It's not the animated cartoon that plays in the heads up travel writers. Things have gone downhill lately due to unchecked growth and overcrowding. Change those out of state plates and learn to enjoy rain.
If no one is smiling back, no one wants what your selling, weirdo. Fuck the fuck off.
And now feel they have the right to tell us how to feel about that.