music we usually hear is not good music...

Most people prefer to buy music they have heard before. For people to have heard it before the song needs to be played repeatedly over a period of time; people will buy music only if they are familiar with it.

The TV or Radio station promoting these songs don’t do this on account of an RJ or VJ’s personal choice, the shows producer dictates which song to play depending on advertising revenues. So if it advertising revenues from a new film release, songs featured in the film will be played over and over in a way to patronize the music/film company.

So we don’t really get to hear good music but what is good money for the radio station or TV channel. Given that, its mostly new releases that we will hear and that will sell.

And truly, in the music/film distribution business, 75% of sales accrue from new releases. If so, do you have good music taste or does your taste just reflect what you are familiar with.

Perhaps, popular music is not necessarily good music it's just what we are made to hear to get familiar with.
Good music is what we usually don't hear often most likely from an independent label with not big budgets to promote.