User blog comment:Defender7881/What happens when Realism is applied to the game.../@comment-34603851-20190330071804/@comment-34517845-20190401180203

The fuse is there for a reason.

You can't have the shell detonate on ANYTHING. The fuse allows the shell to go through obstacles and armor before exploding inside the tank (In which the fuse and delay timer work together to get the shell penetrate and then explode inside the tank.