Wrong. MRL RY, WP discovered several compounds on the market today. The problem was that R&D leaders decided they could outsource the work and laid off too many scientists and destroyed the golden goose. It's true Merck lucked into Keytruda and didn't know what they were getting at the time of the merger.
Without strong Research division, the entire company will have problems. No one on the outside will know though because Keytruda's success will mask the disfunction going on inside the labs. Sad for the good ones remaining.