“can usually put one down withing a mile of where he’s aiming.”
Try doing that with contained helium.
The balloon isn’t open and you can’t change the pressure of the gas inside, except by “popping” it.
I don’t get the point.
The “Expert” said it couldn’t have lifted the kid...that was his opinion.
Now you’re changing the argument (or whatever the point is) to talking about a piloted balloon (helium balloon in the common sense are rarely used nowadays, they are hybrids because helium is relatively expensive to continually vent to the air)
Nobody was in control of this homemade contraption except the slow leak it apparently developed