Lee Hsien Loong says there would not be ‘another Lee Kuan Yew’. But partly because he would not allow it.
He would not allow someone who was a lawyer who fights for unions (real ones, not NTUC).
He would not allow someone who fought with the government of the day while fighting for independence.
Basically, Lee Kuan Yew made it impossible for another Lee Kuan Yew to appear. Lee Kuan Yew made himself unique to and in Singapore. But he is not unique in the world. Adolf Hitler, Vladimir Lenin and Mao Zedong all did the exact same thing.