You didn't read what I wrote, did you? 😛
I specifically stated that would be the LEAST IDEAL solution - preferably getting this shit into orbit by means of a "space elevator" concept. We have the time and space to wait until we can come up with a more reliable means of launching things into orbit, so thus why I'd suggest hoarding it all until we can do that.
Because yeah, exploding launch vehicles, errant rockets, failed boosters, it all can and has happened, and that would result in one hell of a contamination mess.
Why I didn't just quote myself right there, I have no idea. :\