I don't agree, really. Kodak lost its core business - film manufacture and process, and struggled to find a replacement. They did make a success of their cameras, but circumstance lost them that again.
Their lower to mid-range digital cameras were always well-priced and of reasonable quality. However, this market has been overtaken by phones having cameras. They have never exploited the high-end camera market, and never been known for phones, so are losing their only real market.
Printers? I don't know why they made less of an impact than Nikon, but Canon and HP have always had more involvement in IT (HP rather obviously).
It's the likes of Canon & Nikon that have successfully exploited the high end market.