Because since he learned that Thanos wanted to "permanently" eliminate half of the universe's population, he realized that this snap of his fingers was not as simple as many people analyzed.

Moreover, the disappearing population will not expand again with the increase in fertility rate.

It is equivalent to setting a maximum population limit for each civilization and race on the basis of the existing foundation.

Taking the earth as an example, the total population is about 7 billion now, and half of it will be about 3.5 billion.

After that, no matter how many newborns are there every year, the same number of elderly and adults will die.

They either died from various diseases, murders and accidents, or natural disasters such as earthquakes, tsunamis, volcanic eruptions.

Anyway, the total population will never change.

Perhaps in the beginning, the sudden disappearance of half of the population would lead to economic shrinkage and serious political challenges.

But after everything calms down, the remaining half of the population will inevitably get more resources.

At the same time, the reduction in population will also significantly reduce the demand for arable land, grain, animal husbandry and fishing industries, and reduce greenhouse gas emissions by at least half.

It can greatly alleviate the damage caused by humans to the natural environment and better protect the environment and wild animals and plants.

However, the only problem is, when it is implemented in detail, how can Thanos achieve "fairness" in the absolute sense.
Chapter completed!