Having it safe to go outside is the very point of a society.

Outside of this safety Bubble there's a strong tendency for conflict and war. Only after two cruel world wars and a prolonged cold war, the western world got their shit together and decided 'enough of that'. And even that doesn't seem to hold much longer, so it seems we will only have managed to live peaceful among each other without an immediate conflict with somebody (cold war) for roughly 30 years.

If aliens are remotely like us, they shouldn't know about us.