I genuinely disagree. It seems to me like the planet is overpopulated, that there is massively unfavourable bias in terms of who reproduces the most and that, imperfect a proxy for intelligence as it may be, lack of common sense of the magnitude in question is a good enough signal to indicate lack of intelligence, which is itself a decent proxy to indicate lack of contribution to society (intelligent does not imply high value, but stupid implies low value).

The notion that human life is precious is a remnant of times when child bearing was risky, life expectancy was short, agriculture was a bunch of mules and a bunch of peasants and medicine was not scientific and we had massive shortages for manual workers.

These days, if we start to lighten up a bit in the lower half of IQ distribution it might be much more of a blessing than a curse.