Wrong though.
Why? Because while what you say about more breathing room is correct, it is not correct that it always means the people who want larger maps only want it for this reason. As I (and one more already) mentioned, some people LIKE playing with huge numbers, having fleets of hundreds+ ships, etc. I also like the breathing room and not early contact, but that doesn't mean it is my reason for asking for larger map.
Haha, you just THINK that's not part of the reason. If we cram you in on a tiny map where your first encounter is on turn 10, you'll be singing a different tune, oh yes. I know your type. I'm one of you.