A stillbirth is slightly different from a miscarriage, so I can see your point. The child is older, better able to survive outside the womb or indeed to survive the trauma of birth itself, and it is easier to ‘see’ and to test for when or if life is extinct. But in the case of many miscarriages, they take place when the child is perhaps 10 to 11 weeks gestation, in a situation where there has been no documented fetal movement, no activity, often for days, the amniotic sac has disappeared, and there are obvious tissue changes, etc. These poor little ones are obviously lifeless and could not be baptized but are still precious in God’s eyes. If we can trust in God’s mercy to us, most of us full of sin (I know I am, and struggling), how much more can we trust in His mercy to the most personally innocent of sin, the youngest and weakest? In my opinion, the idea that we have to baptize even when the criteria are not met in order to be ‘sensitive’ is one of the reasons we have so many UNREASONABLE Catholics today. They’ve never had to actually sit back and let GOD’S will be done, there has always been an obliging prelate or theologian or whatever to proclaim that 'we can get around that, you can go ahead and have it YOUR way". And so any time they get a teaching that, “This is what is required for Catholics” their first instinct is to dig their heels in and say, “Not for ME it isn’t!”