The assertions are just one imagined possibility. One hopes it is incorrect, and not factual.
Maybe the "why" eludes you for you have yet to understand from their shoes. You are thankfully not them.
Understand the Secular Humanist that believes the planet may die if Human Population explodes from 7 Billion to over 11Billion humans. Look at that from their perspective.
There is an Urgency to Boomers, as they either go out with a bang, or fade away.
The Human Overpopulation warning group of people disappeared in the 1970's just like ProAbortion groups disappeared in the 1970's. They just rebranded their marketing scheme and changed their frontman name from HUMAN OVERPOPULATION to CLIMATE CHANGE, the end result of Human Overpopulation which allows them to address it openly without discussing plans to Reduce The Herd. "Pro Abortion" changed their group name to ProChoice, a more palatable label for the scheme to support, yet same actions and results.
We've gone from 3Billion People to 7 Billion People on the planet in 50 years. Mathematically, to go from 7Billion to 11 Billion will take half that time, by 2050. That is their point of no return, as their scientific predictions are thus that 11 Billion is the Max, and if they don't CHANGE the human breeding CLIMATE now, then by 2055 there'd be 15 Billion; 4 billion more than can be fed, without several other species going completely extinct.
Imagine Boomers thinking that in their own one lifetime, this could occur.
Their group is diabolical, and think that the greatest threat to their children and grandchildrens existence is the existence of everyone else and their grandchildren, and all that goes with it... For one example, the Catholics encouraged breeding program threatens them. Hunting and Fishing threaten their Humane Society. Eating plants and bugs only for protein is tantamount to caring for the equality of all living species to them.
To Gain:
-A Utopian planet returned to the Natural Wild.
-Control of the ALL revenue, ALL real estate, ONE centralized Global Government... (Karl Marx equity outcomes based, not equality for the individual based, yet both result in everyone is the same. Same clothes, same haircut, same food, no jealousy)
by making the rules completely different than you imagine. The People will Own nothing, yet in the Utopian dream, they'll have everything they need provided for them. There will be so much more around to go around with less people to share it with.
That squares