NASA is different because its money is Congressionally controlled, so not only does that expect perfection in an area that will have mistakes, but has a small window to act in before political interest wanes, and has little flexibility as things are learned on the way. The only advantage of a national space program is deep pockets. Even the small percent that NASA gets is a lot more than most commercial organizations can swing. Imagine if they had a few percent of what the military gets and a bit of latitude to find ways for us to expand out.