Evolution doesn’t allways result in outcomes that are “fair” or optimal. Evolution doesn’t actually “care” to make any one species the best that they can be. As long as you survive, and your offspring survives, you pretty much have to deal with the crap you are given. As for the kiwi, this evolutionary result may be uncomfortable, but it allows them to hatch chicks that are able to leave the nest really quckly.

Would you like to know more? https://www.kiwisforkiwi.org/about-kiwi/kiwi-facts-characteristics/kiwi-life-cycle/producing-an-egg/ or https://www.audubon.org/news/why-kiwis-egg-so-big