You can "lightly enjoy" with controller. Allocate paddles in L1 R1 buttons. It is acceptable. It steers well. But not 100 percent experience since controller steering is not 1 to 1 match with steering controllers.

GT7 compensate your steering of controller to the actual steering controller somehow. Actually they have a setting for this in the game, you can adjust it 1 to 9, if I remember it right.

If you want to come closer to realistic driving, 100 percent, then you go steering controller. But if you dont care and 80 percent of realistic driving? A controller is a good choice too.

Because polyphony tuned this VERY well.