Not that I think your device has the same danger because water captured from the air will likely quickly be released again into the same air, but I think this is not a very good example of the safety of your device:

It’s similar thing to taking water from a river. If we take all the water from a river, can we dry up downstream? Yes!

We can and we do. The Colorado and the Yellow river no longer consistently reach the ocean.

Average 3 years when they start potty training? Over here preschool starts at two and a half and kids are generally expected to be potty trained (accidents do still happen of course).