I think that classical music is the best genre in particular for two inventions:
- Orchestral music: created and developed by the classical music composers. Thanks to it, classical music has reached the highest sophistication in the vertical dimension of music.
- The sonata-form: created and developed by the classical music composers. Thanks to it, classical music has reached the highest sophistication in the horizontal dimension of music.
Thanks to the combination of the two inventions, the classical music composers have reached the highest artistic achievements in music.
Now, someone might say that in all genres there are beautiful tunes, not only in classical music, but this is a superficial consideration. If the only thing you want to consider are the "beautiful tunes", then yes, all the genres could be considered equal. However, if we don't want to be superficial, we should remember that for example Mozart's music has NOT ONLY beautiful tunes. It's music which combine beautiful tunes with the sonata-form and the orchestral music. Perhaps the two last ingredients should be taken in consideration before to say that a simple pop song is comparable to Mozart's music only because it has beautiful tunes.
An other consideration: a sound technician in an other forum explained that he has to do miracles to make some famous pop singers sound right.
This is probably the reason for which we see so many embarassing situations in pop music.
This doesn't mean that there are not trained singers in pop, but this is a relevant detail to make a STATISTICAL comparision between genres. STATISTICALLY speaking, should I take a genre full of hacks as seriously as a genre like classical music whose singers and performers are in average highly trained?
Finally, the genre is critical in determining the AVERAGE contents, because a genre usually brings a culture with it.
There are genres in which the AVERAGE contents are dumb and others in which the content is in average more serious.
And if someone tell me that the content don't matter, because they don't define the essence of music, I don't agree: the must be taken in consideration for juding the overall artistic product. Dumb contents ruin the music.
In conclusion, the idea according to which all genres would be equal doesn't make sense to me.