Feedback Beginner here - Best Practice Question

Hello I am following a tutorial on how to use Unity, doing a basic shmup. Where i am at he is saying to create a script for an object that gets instantiated, and the script's entire purpose is to destroy the clone. Is it better to break code down into multiple scripts, or just ad the couple extra lines in the script that instantiates the object?

Here is the code that I used;

Code (CSharp):

1. private void OnTriggerEnter2D(Collider2D other)
2.     {
3.         if (other.tag == "Bullet")
4.         {
5.             Destroy(other.gameObject);
6.             if (_player != null)
7.             {
8.                 _player.AddScore(5);
9.             }
10.             Destroy(gameObject, .2f);
11.             GameObject newExplosion = Instantiate(_explosionPrefab, transform.position, Quaternion.identity);
12.             Destroy(newExplosion, 2.38f);
13.         }
14.         if (other.tag == "Player")
15.         {
16.             if (_player != null)
17.             {
18.                 _player.Damage();
19.             }
20.             Destroy(gameObject, .2f);
21.             GameObject newExplosion = Instantiate(_explosionPrefab, transform.position, Quaternion.identity);
22.             Destroy(newExplosion, 2.38f);
23.         }
24.     }

What he has done is to create script for the Explosion, and that script just destroys the object, So instead of Destroy(newExplosion, 2.38f); like i have in line, he wrote a script that just says:

Code (CSharp):

1. void Start()
2.     {
3.         Destroy(this.gameObject, 2.38f);
4.     }

 

I'd say that creating an entire script which does nothing but destroy itself is just unnecessary overhead.
It's literally just one line of code that can be applied anywhere. Might as well make separate scripts for other one-line functions also.

Adding the

Destroy

call in the

OnTriggerEnter2D

method (or wherever else) is perfectly fine.

 

Thank you!
That was my thought process too, but since I am so new I wasn't entirely sure if one way or the other actually took more to process or if there was other reason i didn't think of as to why one way would be better than the other.