I first heard the phrase “the tyranny of the Like button” from Perry Marshall.
A quick Google reveals the phrase’s widespread use and varying degrees of meaning.
Perry’s take was that we all want to say something people will like, and they want to say things we will like. After a while, we’re all trained to say what others will like, so that’s what we keep saying and that’s what we keep hearing.
The danger of course is that we come to think that opinions are universal and our subculture is the only culture.