So, you leave your machine with BitLocker unlocked and unattended and people can gain admin privileges? I don't see how anyone would expect their data to be secured by disk encryption of the machine isn't powered down.
Let's say you are a desktop admin updating 500 Windows 10 machines. Maybe some of these machines are terminals for customers. This bug is a significant attack vector to gain admin on those machines being updated.
Or am I missing something?