To Work Hard in Silence or Not To

While ago I posted a message on my linked which had above message: "work hard in silence, let success make the noise!". I got over 28 likes. It seems people liked this approach despite I am considering myself as loud mouth.

It made me think about what is all PR and marketing activities then? Imagine we have a world with no ad or public campaigns, is it gonna be a better world? I am reluctant now.

What do you think?