

Yeah, that plan wouldn’t work. There are plenty of people today on earth, where we have endless access to education and contraception, who go out of their way to have like 12+ kids. They know what they’re doing and simply don’t care.
Someone telling people “Hey, be real cool if you like, had fewer kids” just isn’t going to accomplish anything.
So, economical reasons couldn’t account for the slowdown. It’s 100% education and contraception…? Not the cost of living is so high and pay is so low that supporting another human is a risky venture. Or people are working so many hours to make ends meet.
I’m saying most living things, real or fiction, are more likely to be selfish than listen to literally anyone telling them not too. And we see this in the MCU repeatedly, both on earth and in aliens. When you emphasis freedom of will and choice, you cannot be surprised when it’s exorcised.