Why Intel need to re-create discrete graphics card product?

Simply put, Moore's Law has reached limitation. Intel cannot provide more performance by simply shrinking process nodes. That means it is impossible to improve performance of integrated graphics dramatically without growing the CPU package into a giant costly monster. If Intel want to remain competitive and relevant, discrete graphics is the way to go. Maybe Intel will find other ways to do creative MCP, like what they do now with EMIB and Radeon. But the graphics nature makes it an unfit with CPU on the same die.