Collider2d.bounds.Intersects not detecting intersection

I'm making a top-down game where you drive a car and shoot targets at the same time. I have a script that makes a sprite of a crosshair follows the mouse cursor and I want to have it set up so that when the player presses the mouse button (the mouse button isn't in the code now) and the crosshair sprite is overlapping an enemy sprite, the enemy dies. I was following this documentation on Bounds.Intersects. Here's my code:

 public class shootingScript : MonoBehaviour
 {
 
     public GameObject target, enemy;
     CircleCollider2D targetCollider;
     CapsuleCollider2D enemyCollider;
 
     // Start is called before the first frame update
     void Start()
     {
         //Check that the first GameObject exists in the Inspector and fetch the Collider
         if (target != null)
         {
             print("targ not null");
             targetCollider = target.GetComponent<CircleCollider2D>();
         }
         //Check that the second GameObject exists in the Inspector and fetch the Collider
         if (enemy != null)
         {
             print("enemy not null");
             enemyCollider = enemy.GetComponent<CapsuleCollider2D>();
         }
     }
 
     // Update is called once per frame
     void Update()
     {
         if (targetCollider.bounds.Intersects(enemyCollider.bounds))
         {
             print("hit");
             Destroy(enemy);
         }
     }
 }

In-game "targ not null" and "enemy not null" prints but when I move my cursor and the crosshair goes over the enemy "hit" is not printed and the enemy is not destroyed. I have a CircleCollider2D on the crosshair and a CapsuleCollider2D on the enemy. The script is on an empty game object.

Also, I'm a noob so apologies if this is a stupid question.