What you feel is what you feel. Feeling is pure. Expressing feeling is healthy.
Why are we a society that condemns certain expressions of emotions?
When you are feeling sad or mad or lonely and you can't help or change how you feel, it's scary. You truly are trapped and confined within your own misery. It's scary.
I support cussing when in expression of feeling. Sometimes throwing or smashing or punching is the only way to shake loose of your confinements. Sometimes it doesn't help.
Please do not stomp on others' for feeling the way they feel.