He was known as an organist until the 18th century when someone decided to lump him in with the greats. His works were polished. Yes, he dedicated his life to music - but that’s also where his tenure started. Baroque style borrowing from others and making “commercial” music of his day. He was a nepo baby by our standards. His older brother that raised him wasn’t a Duke, but wasn’t poor either. He went to the best schools. They all borrowed from each other in this age.