Let's see you do it. ;-) It's 1300 miles from Midway to Hawaii. You can breathe the air the whole way. Yeah, I'm not too eager to point my dugout at the horizon and go but the fact of the matter is, the environment is substantially similar from the minute you get in the canoe until the minute you get out. Deep space? We don't even know if a Bussard ramjet will work out there because we have no idea what the interstellar hydrogen distribution is. I get the spirit of what you're saying but it's the equivalent of "the bumblebee flies anyway" which is only used by people who want to dismiss the expertise of people in fields they don't understand. Space is fuckin' far. Full stop. And I want to believe but as soon as you dip your toe into the physics of what's being suggested things start to get discouraging.Leaving the solar system isn't difficult