We do meet the baby back home.
1. Pre-baby showers feel like an insult as you're buying gifts for someone who isn't in the world yet. (Personal opinion, not trying to get flamed)
2. You aren't left guessing the size, length, gender, name, and looks of baby, cuz you can have a peek. (privileged guests may hold LO)
3. Puts a little extra thought into family planning, as the parents-to-be have to acquire the newborn necessities. Since baby will already be ~1 month old, most guests will bring things for the later months-years.