Crouch was again restricted to a late substitute appearance during Saturday's goalless draw with Blackburn, despite the absence of Fernando Torres through injury.
The 26-year-old England international has only started one league game this term and Benitez has hinted that Crouch could be better used as a substitute.
"Is Crouch better as an impact player? He could be. Some players are like that," noted Benitez.
"Against Blackburn, Harry couldn't play from the beginning. Yet when he came on, his impact was very important for us. And Crouch was the same.
"Sometimes when players play 20 minutes or half an hour, they are more important for the team.
"Has Crouch been poor when he has started? I cannot say that. Maybe if he had played from the beginning, it would have been different.
"We knew Blackburn were really dangerous in the middle. But when they were tired, we had more chances."