Why is Shido so strong?

Could you elaborate on the reasons behind Shido's seemingly unparalleled strength? Are there any unique abilities or characteristics that set him apart from others in his field? Is it due to his rigorous training or perhaps a natural talent that he possesses? Additionally, have there been any notable instances or accomplishments that showcase the extent of his strength and abilities? Understanding the underlying factors that contribute to Shido's strength would provide valuable insight into his impressive capabilities.