Timo pretty much outlines why I would never encourage anyone to try and do non-pop music as anything other than a hobby. Unless you are extremely lucky all the hard work will never amount to anything you can live off of. Better off spending some money on the lottery, and if you hit that then you can record and tour till your heart's content.
While I can see your point overall, I think it's a bit harsh. I don't think it's only pop artists who can make a decent enough living. Tolkki made very marginal music to begin with, and so it was kinda to be expected that he wouldn't be a big star.
rumborak
Stratovarius was a really famous band (talking about metal and taking into account that metal is not that famous) here in Europe and in Japan, from 1994 to 2003. Episode, Visions, Destiny and Infinite had really good sale figures. Infinite sold more than 200.000 copies around the world for example. The band had large audiences and they were always touring a lot. Even Symphony X in 2003 were Stratovarius supporting band on Elements tour era. The problem was that TT got stucked in the same formula and he didn't know how to evolve, plus he started to suffer bipolar disorder and the whole thing started to fall. The contract they signed with Sanctuary was another problem.
Now the band is having success again and they have large audiences around here and are respected again, but this band was almost destroyed due to his behaviour, but well, that is a large story.
But, of course, now (three of four years ago he used another excuse) TT is using the problem of being a metal musician to hide a little bit his problems. He lost a lot of respect in this world and he has payed for that. All these are consequences from a terrific behaviour.