What the title says. Sure, it’s gentle on the environment, but it doesn’t remove soap scum, grease, grime etc anywhere nearly as effective as other products. I also doubt its efficiency as an antibacterial compared to say alcohol or most detergents.
There, I’ve said it.
The actual good way to do it that I’ve seen recommended and used myself to good effect is a baking soda paste that’s left to set and seep in a bit, and then wiping with a rag soaked in vinegar so that the exothermic reaction helps, refresh vinegar as needed. But that’s a lot more work than telling people “use baking soda and vinegar, the fizz means it’s working” and that’s the reason they put lauryl sulfates in shampoo despite it doing nothing