This is imprudent.
All right, he added it was for market research, but even for that it's imprudent. There's too much of a gap between when you read and when you might conceivably get published.
But reading is good for other reasons. It helps you absorb tricks of the trade and the like. And reading outside your genre is particularly important because such works have the tricks and the twists and the things that are not familiar within your genre. Cross-pollinating is healthy. It also helps prepare you for plots and characters unusual in your genre by increasing the variety of models you can draw on.