Ausdoerrt said:
You have to understand how the composer saw music back then, and what music he/she could compose. Today we have much more restrictions, created by the law and the government, which cuts many ways of creativity for many artists. And about that entertainment part, it's mostly there to create a connection between the fans and the guys on the stage. It's also the best way to get money from (gigs, concerts and selling merchandise), because believe me or not, being an independant and good musician is a fucking hard work nowadays! Even being at least an independant muscian, and live for music, is hard too.
Back then musicians were rare, because of many aspects, and even a simple guy who knew how to play a piano, could get a job easily if he had connections or educations (only 'educated' people could do such things, because it was probably a blasphemy for a simple guy to play piano).
Right now, musicians need to work harder, to develop, and when the speed grows up, usually the quality of the 'artistic side of their music' falls down. While back then when the classical music, we know today, musicians could take more time to polish their creations.
When they had restrictions and pressure, most of them on the end of their careers started drinking and die in a very young age.
Just like today, music is mostly linked with alcohol and shits, because they need some kind of a side kick to forget all about this stress and stuff. Of course, there are lots of stupid local bands that make music only to drink, or the other way around.
Also, think about it that way. Today we have much, much more ways to explore music! More intruments, and more ways to use them, and back then they had only an orchestra and they could stick only to that.
So overaly, I think you're wrong that only the classical music was and is an art. You're just looking at it from the wrong way, where every musician today does music only to entertain. That's bull crap! Many of them don't care about entertaining, they care only about their music and entertaining is just a tool to pread their music.