The application of it is not intended to clean the ocean. As you say, you're supposed to put it in the (washing machine, dishwasher, waste etc.) before it gets to the ocean.
At a glance, this looks cool - im in the middle of designing an internal Customer Data Platform/Single Customer View to serve as a single data source for various internal & external marketing tools. Looks like this might be worth looking at.
Does it have an API to access the user profile and group data ad-hoc?
Can you stream data in?
Can it trigger a destination sync when the underlying data changes?
Can it do profile merging (visitor -> known customer stitching)?