Everyone has the potential to sing (And play music) but not all are natural performers or necessarily have the inclination to do so.

Unfortunately, many people are "coaxed" and pushed forward before they are ready or "encouraged" to perform in situations which very uncomfortable for them. Things may not work out very well for them even if they do get a respectful hearing(not always) and this can put them off in the future.

I'm all for people singing naturally and in situations where they feel comfortable but, please, don't force them to do so. Moreover, we should always want to sing and play music because we love it and not just to seek attention..IMHO.