Tbf if you were an alien landing on earth, there's plenty of smooth flat surfaces available. If you can pick your landing spot, why would you pick dense forests or very rough mountains? Same logic when we land on other planets

So many Home Depot parkings lots to choose from, hopefully the analysis-paralysis thwarts their invasion plans.

> there's plenty of smooth flat surfaces available

Any supermarket car park, for a start.

Plus it would be handy for picking groceries so you can have a cup of tea and something to eat while you figure out how you're going to invade.