Saying "two failures" is awfully misleading. There was one catastrophic failure and one minor failure. In a hypothetical manned mission, the minor failure probably wouldn't have even prevented the mission from going forward, let alone endangered the crew.

The catastrophic failure is obviously a problem. However, for a manned mission, there is an abort system which is supposed to save the lives of the crew in an event like this. This is not like the Shuttle where if anything goes wrong on launch, everybody is doomed.

To state it more precisely, out of 25 launches, there has been one problem which wouldn't have been a threat, one catastrophic failure which would be survivable, and zero failures which would have killed anybody if they had been manned.