The fact that we talk about jobs being automated as a negative shows just how messed up our economic system is. The whole point of a society should be to pool effort together to reduce individual labour needed for survival. Instead, under capitalism, we're all expected to toil as much as possible so that 0.1% of the population lives in opulence beyond any reason.

1. World is built for humans. In the near future it could be cheaper to use humanoids for some tasks than to rebuild the whole area for industrial robots.

2. Humanoids are excellent for tasks that require human interaction.

3. In the far future we could have humanoids that can handle multiple different tasks simultaneously, instead of purpose-built robots.

4. Humanoids don't have human limitations. The joints can move inhumanly.

It's Japan. Labor force is shrinking because not enough kids

Eh, the Japanese really like their way of life. They don't want their culture to change. If they'd rather disappear from the face of the Earth than accepting foreigners, I think they're free to do so. Personally, as a Japanese-Canadian, I think it's stupid and they should at least allow dual citizenship so they'd get "immigrants" with actual ties to the country, but they don't even wanna do that. So fuck it, let them do their thing. It really isn't up to anyone else to say they "need" immigrants, imo.

That in any case. But honestly, I'm OK with this job being done by robots. It's hard, potentially dangerous work that isn't complicated/complex and that's exactly the kind of work we should strive to automate.
That the money saved probably doesn't end up where it should is a different issue.

Every country will experience labor shortages at some point, it's unavoidable

In an infrastructure built for bipeds there may be advantages to such a design for flexibility of function. If this is truly a long term monotasker the only real advantage is PR / curb appeal.

They are not that strong.

That's what people use GPT for

Don’t take that too! It’s all the robots have left me with.

Presumably because all the other stuff (trollies, height of conveyor belt, ...) is shaped and sized to accommodate the humans who have been doing this work thus far.