Let's say we don't.
This seems like an incredibly bad idea to me.
There is no way to practically address the safety concerns of launch vehicle integrity up, and through and out of the atmosphere and near earth orbit.
That is one payload you really don't want air bursting in atmosphere, and it is no better raining down Kessler Syndrome style from orbit.
Get a quantifiable, relatively "safe" way to get it out, and we can start taking about the other impossibilities and costs