I'm assumimg that science has thoroughly proven that fact. Then it should be allowed.
I remember in the 1970s, science told us by the year 2000 we'd have more people on the planet than we could feed, and that people would be in constant war over food and other resources.
They also said we only had enough oil to meet rising demand until the mid-1990s. Then we'd all be cooking over flames and reading by candle light.
What was the scientific solution for these problems? Cut down on the population -- birth control, abortions, forced sterilizations, .....
It never occurred to the scientists and the people who believe whatever they are told that these predictions could be WRONG.
What if someone took it upon themselves to kill off 100 million people or more to make life sustainable for the rest? Given those dire predictions, science would have agreed with that plan.
These are the problems encountered when playing God. Unless you have perfect information and perfect predictive insight into the future, any actions you take may not fix the problem -- and it'll be too late to undo the moral atrocities committed in the name of "science."
Sometimes the very thing you did to avert a crisis could be what ushers in an even worse crisis.
The Old Lady and the Fly should be required reading for everyone. It's a lesson for all, that sometimes the cure is worse than the illness.