Coaches/scouts aren't looking for hitters who walk. It's why they are called hitters, not walkers. A coach will notice a smart hitter. It's smart not to swing at a tough pitch when up in the count. But a coach will shake his head if a hitter he's scouting consistantly takes 2-0 pitches down the pipe.
Keep in mind every hitter at the next level was a top hitter at the previous level. At each level the hitter adapts. If looking for walks becomes the next adaptation it's the last level that hitter will be playing.
Note: The Red Sox were early adapters to analytics. Now they are saying they came to rely on them too much. They are now looking for balance.