How much do/can they use their own thrusters to change/correct their directions? I'm guessing it's just fractions of a degree? And needs to be extremely precise, done weeks? before reaching the next planet to slingshot around?
I suppose it depends on what you're protecting, who's out there to get you, and how boring and time consuming it is to clean up after a breach (can't that take weeks or months), etc.
Aren't you're a bit asking "When X transportation method isn't used by everyone, can it really be any good?" :-)
Not having half of your kids die, could be one thing:
"For most of human history, around 1 in 2 newborns died before reaching the age of 15. By 1950, that figure had declined to around one-quarter globally. By 2020, it had fallen to 4%."
Reading your other comments, I was just thinking that you seemed to group everyone who look the same, together, and think about them as if they were 1 type of person you could generalize about. For example, white men, or black men, or women. - So, yes I suppose you did.
For example, if your country gets attacked, primarily the men go and defend their country and people. Is that "thoroughly awesome"? Anyway have a nice day
But that's what you're apparently supporting, looking at how you're writing.
Plus you are misrepresenting what I said.