[Omnikaiser]

Quote:

Originally Posted by Xtreme RX

With Izu, there's no way to bring her original incarnation back so there's more similarities to human death. It's permanent. So him trying to rebuild the exact same "person" feels wrong.

That's the thing. Humagears are not humans. Izu death is not permanent in the same way it is for a human.
In the end they are still a product/species of humanoid robots made by men to help them with tasks or jobs.
The show wants you to understand you have to respect them, you can love them, they can even have a form of feelings and heart (even in the shape of a dog or that "counselling AI friend thing" which helped the cast at some point). But they are not humans. and they have a characteristic humans don't have, they can be rebuilt.

The show wants you to think and understand that there is no difference (at least in-universe) between restoring Izu with the "secretary Izu" key digitally or if it's Aruto doing it "manually".
The first shot we see of Aruto in the epilogue is him pressing the secretary izu key button. In-universe this makes no sense, as he probably pressed that damn button one billion times already and he knows it doesn't work anymore. The shot is just here for us to make the parallel between the key and Aruto teaching Izu again with his memories instead. It's a "If it doesn't work with the key, I'm going to do it myself" message.

For us it feels weird, yes, because we live in a world of humans as the only species with such a degree of sentience and intelligence in these fields, (and Humagears are humanized/treated as 99% humans during all the show which of course can confuse us).
But in-universe in zero-one that's a bit different. humagears are different because of the rebuilding thing, back-up or no, and that's what makes the situation with Izu not/less weird.

At least that's how I understand it.