Why do noobs like large maps?

Large maps means that it is harder to wall in your base using buildings which can be a huge difference when two noobs are fighting. If you do wall in your base you still need to secure resources outside of it because larger map=more resources in between the two players.

Maybe they are thinking that larger spaces means they have more time to get to castle age where they can win the game but fighting in castle age has a lot higher skill ceiling than fighting in Feudal age.

Feudal age->Producing from 1 TC. Microing a handful of units.

Castle age->producing from 3 TCs. Microing way more units potentially against mangonels.