Jesus christ, you need to touch grass, your online bubble is rotting your brain. You think you know anything about me based on a throwaway comment about some random technology?
Fact is, it’s not being used now for a reason. Such exoskeletons have been around for over 25 years, and have not come to fruition.
This whole article is literally about the range of areas this tech is currently being used in, commercially and domestically, and how fast the industry is growing.
Battery density is ultimately a hard problem. Physics and science has limits. Expecting those to be traversed just because you have beliefs or really like a technology. Is foolish.
Battery technology has been steadily improving for years and there's plenty of legitimate paths of research for the forseeable future.