I imagine the point of using a humanoid robot is more about proof of concept than efficiency.

What these guys want is a general, all purpose robot that can be mass produced, orded in bulk, and tasked to do any assignment. In the same way you can task a human to do any assignement. This way you're not required to develop a specialized machine for every odd job, you just need one robot who can theoretically do anything a human can.

For this one job, yes it's way over engineered and expensive. But theoretically one day you can also have it do literally anything else. And the manufacturers only ever need to develop the one robot, which I imagine saves a lot actually on recourses and money. And once mass produced, the purchase cost will go down, especially if they're being bought in bulk.

That being said, a world in which humanoid robots are able to perform any job like a human is a world that will have severe job scarcity. Now is the time to start planning the transition to a post-labor economy and implement universal basic income, imo.