In other areas of life much effort is placed into arguing that the right of a choice made is sacrosanct, that to suggest there perhaps might be reason to pause for a reassessment is heresy, that to take the public pulse more than once is undemocratic, that those who are dissatisfied with the direction of a nation's travel are beyond the pale and deserving of encouragement to expel themselves from the society they live in.
The not at all unexpected results in the article linked in the OP suggest that, in the way advocated in other important matters, nothing should be done. Those who acquire a life expectancy as much as 18 years less than average and have significantly more children than average, leading to more distress than average in a coming generation should be allowed to, unhindered and without any discouragement at any point. No effort should be made to change the situation now or in the foreseeable future. They should be allowed their detrimental choices. They should be allowed to die early after prolonged bad health. Accordingly, thoughts of concern over the effects on many children are misguided. Anything else is a foreign concept, we are making it clear that we intend to be in full charge of our own lives (and our dependants) for better or for worse, and so it shall be for all.