It's not a difference in philosophies, it's different stages of development and testing. Starship and Starliner are very different things. Starship is the laun

It's not a difference in philosophies, it's different stages of development and testing. Starship and Starliner are very different things. Starship is the launch vehicle and a novel one (as in, it's not just a rebuild of an existing system, it's got new components and design elements). The failures we've seen so far were all, to some extent, expected though the particular modes of failure may not have been anticipated. They were launched with the intent of discovering the failure modes and responding to them with changes to design and manufacturing. Starliner is now where Dragon Crew was with DM-2. Both tested with uncrewed flights and various test scenarios before their crewed flights. DM-2 and this flight are flights where nothing should go wrong. Failure, or critical failures at least, are unanticipated events. Otherwise you wouldn't be putting people in them yet (both vehicles are capable of operating autonomously, there's no reason to put a person in them if you aren't confident in the vehicle). The same philosophy applies to both Dragon Crew and Starliner at this stage.