Mozarts compositions aged 5 were not composed solely for commercial gain.,

Amazing at it may sound, Dick, but the various members of The Spice Girls, Monkees, Sex Pistols, Boyzone (etc.) weren't doing music for commercial gain when they were 5 either. Precocious, or otherwise, all musicians must learn their craft & pay their dues before taking their place in their given Tradition, in which commercial gain, or paying the bills, is part of the reality that shapes the musical landscape. In this respect there's no difference between Westlife and the Watersons.