Because, real talk, think about who you are right now and ask whether you are the best possible self you can be. Could you be spreading more positivity? Thinking less negatively? We're all secretly (or not so secretly) racist and sexists. And we all spend too much time thinking about ourselves instead of the greater good.
I know I'm not going to change any time soon and no single speech or heart-to-heart talk will be able to make an immediate change but really...we could all be better.
More to add later?