It's for lazy noobs who don't actually want to spend any time or effort.

Yeah, they're definitely not for me. But sometimes can be really fun for little ones or those who have a hard time staying interested in survival aspects of the game. Creativity is a thing that not all people can exercise well, and this may be a way for them to get enjoyment out of the game a bit more. You could really ask the same thing about any Minecraft "challenge." But I definitely see where you're coming from, I don't love these particular ones, they just aren't made for me. But doing a playthrough with an item drop randomizer can be pretty fun.

From experience, it's more of a thing for kids. I've played one of these with my little cousin, and I asked her what her favorite block was and downloaded one of these packs to play with her. She found it to be really fun as we got to play the entire game from beginning to end and kill the dragon, all while laughing a lot due to the extreme nature of the gamemode. I'm 21 now, beaten the game tons of times, done a lot and this gamemode by itself wouldnt be fun if it wasnt by this