Try telling someone that just had a miscarriage that is wasn't really human and to say you lost a baby is an insult to "actual humans". Or the couple that has lost multiple still-born at 37 weeks that it wasn't a person. It may not be fully formed or out of the womb but it is not just pre-human goo.
I don't expect anything more than this sort of remark from you though. I hope beyond all hope that should you ever find someone that will want to procreate with you and desire to reproduce you don't find out how painful losing a "pile of pre-human goo" can be.
Depends, though. I know someone who had a miscarriage, and has the (chosen) name tattooed on her wrist along with that of all her living children, who still thinks about the lost child often, and "celebrates" the unbirthday. On the other hand, my mother lost two babies and she never considered them children; sad occasions and a loss, certainly, but not a "person lost".
This is very much a cultural thing. The generation of my grandparents was much less emotional about loss of unborn children, younger people take this more seriously. On my father-in-law's side, they lost 2 out of 9 children, and, well, too bad. On my mother-in-law's side, they lost 1 in 8 in birth, and, well, "that's just normal". With my grandfather, they lost one at age 3 or 4, and even that wasn't really considered abnormal or terrible, just one of many dangers and the reason you had many kids, after all.
Even now, there're still communities/cultures where naming is postponed until a certain age (3 or so, in general) so as not to get attached too much beforehand, especially in poorer countries where child death and miscarriages/stillborns are much more common, as they were here a century years ago.
As children start to have a much higher chance of survival, we get (on average) less children, and we get attached much earlier. Also visible in something else: even back when I was younger, it was common not to announce a pregnancy until you were 3 months or so along. Now, I see friends announcing it at around 6 weeks.
None of this is meant to, in any way, lessen your pain or loss, for the record, merely to point out that it
is connected to where and who.