You cherry-picked the first part of that paragraph. The end goes like this:
Arbaugh went on to say that he has since recovered from the initial disappointment and continues to have hope for the technology.
And then the next part of his statement is found in the following paragraph:
“I thought that I had just gotten to, you know, scratch the surface of this amazing technology, and then it was all going to be taken away,” he added. "But it only took me a few days to really recover from that and realize that everything I’ve done up to that point was going to benefit everyone who came after me.” He also said that “it seems like we’ve learned a lot and it seems like things are going in the right direction.”
Of course, the goal here is not to have an honest assessment of what happened. . .but to simply choose what we want to further our hatred (justified, IMO) of Musk.