Earlier quoted context omitted.
I understand your point. Music is one of those careers, like professional athlete, that make parents cringe when optimistic children announce an intention to pursue it. Your numbers are off (the base pay of the Chicago Symphony Orchestra last time I checked was around $200k) and there ~30 violinists in that orchestra alone. But it's not an order of magnitude. But just because the numbers are small doesn't mean societ…
But society in general does not really support professional athletes in any directed “conservatory” sense, beyond the weird obsession with college sports in the USA. Corporate sponsorship pays the bigger amounts: that is a side job with its own commitments. Prize money: by definition not available to most. Directed pay is a tiny fraction of it (stipend level), even at the highest levels. Athletes have other jobs. Aga…
At least some countries have programs where (candidate) Olympians get professional support and a stipend.
See for example https://www.uksport.gov.uk/our-work/investing-in-sport/how-u..., https://www.dosb.de/en/themen/athletes/services-for-athletes