I don't know why people keep expecting the game to have features like this when it's still in early stage Early Access. It's at v0.206.5. If this game is released already, at v1.0+, then I would understand this question, but it's not.

Why aren't there advance world generation settings? Because the game hasn't been released out-of-development yet. The developers have priorities. Have you read the forum lately? Unreasonable people (not you) have been asking for a myriad of things, expecting it's all just a matter of 'it's easy to implement!" - maybe, but only on the notion that a thousand other people aren't feature creeping for a whole bunch of 'minor' things too.

As for a possible solution to your problem? Turn on F5 console. Go to your game launcher options and add -console to it. In-game, press F5. Type devcommands, then type debugmode. Afterwards, press Z to fly, B to build stuff without using resources, K to kill everything around you.