Selfishness is not living as one wishes to live, it is asking others to live as one wishes to live.
-- Oscar Wilde

When you judge another, you do not define them, you define yourself.
-- Wayne Dyer

Every ounce of energy that you spend worrying about what other people are doing is taken from the pool of energy that should be going towards propelling you to your goals and fulfilling your life purpose. Every person is unique and comes with their own journey and life purpose. Judging what they are doing on their journey does absolutely nothing to help you on yours. Stay focused on yourself, it is one of the most selfless things you can do.