Save? Plenty. It means less parking spots, less HR, less toilets, and so on. They don't get ill, don't have good days and bad, they are fully trained the second they start, and so on.
The most difficult part of business is the human element. For better or worse these mitigate that. The resources freed up from addressing the human element can focus on other opportunities.
Robots dont get ill? Talk to anyone who maintains complex moving machinery such as aircraft or industrial machines. They have bad days. They have lifespans and old age. Some develop long-term diseases (corrosion). Some even get viruses. They can be down for months, even years, as such faults are corrected.
When was the last time a robot took an employer to court for a slip and fall. Most (warehouse) employers would rather have one FT employee doing robot repairs, than a warehouse filled with humans.
Yes, of course robots aren't indestructible or immortal. But they're still easier to manage than the majority of humans.
It's also questionable how much cheaper robot training is. Specialized programmers to write special-purpose code just for your specific application don't exactly come cheap... Especially when you're not paying them directly, but rather trough some external robotics company you're consulting with. We could easily be talking $300/hour.
The most difficult part of business is the human element. For better or worse these mitigate that. The resources freed up from addressing the human element can focus on other opportunities.