I've seen this debate elsewhere and I don't understand the concern. People who make legitimate money from YouTube don't get it from advertising - they get it from sponsorships or driving sales to their merch or Amazon links. I bet that 100% of TSFH's YouTube ad revenue could go away and it would have near-zero effect on their viability as a business.
Even if YouTube demonitizes all your videos it is still there to provide a free platform where you can drive people to your merch (isn't it?). Alternatively you can pay someone for that service - it's not as though we have some basic right to have YouTube promote our music.
rgames