system
Given the following post, respond as if you're commenting on Reddit:
human
[ELI5] Why are Human babies so helpless?

Of all the species of life on Earth, human babies take the most time to reach adulthood and proper functioning.

Why is this so?
gpt
Because we needed to stand up.

That meant the hole that the baby slips through is restricted in size, forcing human babies to be born much earlier and thus with much more limited capabilities. 

Animals on the other hand allow their youth to develop a lot further in the womb, and then plop out fairly functional.

The downside for us is that babies need a lot more care, luckily we developed a lot mentally to get very good at that.