Which is fair enough however that ignores the issue of how to replace that person on a temporary basis whilst not knowing if they will be back, when and for how long. Also, what do you do with their replacement when they do come back. I don't think this is an issue that can be resolved fairly honestly.
I don't see anything unfair about it.
Humans reproduce, ergo employers employing humans have to structure around that.
It's hard to argue against it being good for society for people to be supported in having children.

