workplace gossiping

If only people can channel the gossiping time into something positive such as improving their knowledge and skill, finishing up their work earlier than scheduled, or helping the underprivileged people- wouldn't it change the world to a better stage?

I am filled with guilty feeling after attended my friend's dinner with his friends of same profession. Instead of discussing how to improve the skill, sharing knowledge and etc, they were badmouthing about other colleagues.

I understand that gossiping happened anywhere, and also to anyone who see gossiping as a way to so-called escape from stressful working environment.

For e.g. judging someone's else work is not good enough. Why don't one of the gossipers volunteering on teaching him/her?
      e.g. criticising someone's being flirty to superior. Well, how does that help in our job performance?

The capability of a gossiper to talk about others in front of us, qualify her/him to talk bad about us to others as well. How would one feels when the karma happens?

I am not a good person that does not gossip about anyone, yet, I believe by reducing that a lot of things can be achieved. It includes becoming a superior and someone successful.

My boss, for instance, is a very good superior. The worst I ever heard her saying bad thing was towards outsiders who call for nuisance. Other than that, she will only discuss about performance of the employees, as well as which restaurants/hotels offer good food.

At least, I feel better and able to sleep well now.