Because why not?
Jealous on creepers blowing up? Well fear not. You can actually craft TNT blocks!
TNT can be used for mining or for messing with your friends houses. ( if you wish )
For experienced players it can actually be used in combinations with redstone mechanisms to make traps or even cannons!
TNT can be activated by a fire source, an active redstone source or explosions… So watch out for creepers when using it.
Do not use TNT on blocks you need, 75% of the blocks get permanently destroyed.