2d Animation sprites - right way?

Hi! I was reading about animation in 2d for sprites, and I noticed that people reallu complicate this. I mean some of them write about 200 lines length component to control simple 2d character.

My question is : is the way I handle it correct and easy enough?

Here is what I do:

 //when want my character to shoot a fireball I do:
 void ShootFireball(){
 anim.setBool("IsShooting", true);
 
 // and then after I want to stop shooting fireball I just do :
 Invoke("stopShooting",0.7f) // --> time visible in animation window how long this anim should last
 }
 void stopShooting(){
 anim.setBool("IsShooting",false);
 }

And that's it. However I am really confused after reading how people makes it much more complicated than this...