Makes sense, if you pick up and make a career for yourself using American resources you shouldn't be cancon, same with startups, can't get amazing startup Canadian capgains if you start Canadian and later basically become an American company.
JB, Celine, Brian Adam's etc arguably started because Canada is such a hospitable environment to artists, if they pick up and basically come American... Why should we classify them as Canadian artists? Don't think any of them even live in Canada anymore, can't say I think they do much for the industry. Matt Dusk, CRJ, lightfoot etc keep it real.