Personal traits and innate talents are very important factors in people's development. In terms of(or you could say Regarding) professional sports stars and famous musicians, there have been debatable discussions among people as to whether natural talent outstrips constant training or vice versa.(you don't need to hyphenate it)

There are some mistakes that make the meaning difficult to establish. You could rewrite it a number of different ways. Personally I would choose: Personal traits and innate talent are very important factors in people's development. There have been discussions about whether natural talent or constant training are more important in the success of talented professionals like sports stars and famous musicians.

Personal trait and innate talent are very important factors to people's development. There have been debatable discussions among the people about whether natural talent outstrips constant training or vice-versa in terms of those professionals like sports star and famous musicians. No correction needed. Everything fine.