Big World vs Random Generated World

Which path would be the best to choose?

Creating a Big world with loads of different spawn would be easier than creating a world that is random generated. But whats the cons of doing that?

Im trying to create like a 2D game that is inspired by MineCraft and i can’t stop thinking about how i should solve “creating the world”

If i would create a realy big world with loads of spawns it would in the end serve the same purpose as a random generated world, But it feels like theres a catch to it all…

I was reading about Noise Maps and it seems realy overwhelming but is it worth to learn how to make and use them?

Someone could share their thoughts?