There has always been a tradeoff between reliability and development time. There wouldn't be a games industry if every video game had the same level of software assurance as a mars lander, because Tetris would cost $200m to develop. A medical simulator lies somewhere between a mars lander and a video game - it needs to provide accurate simulation, but the odd crash isn't a complete dealbreaker.

The bug is now patched, so the downtime appears to be less than 24 hours from discovery to fix. The original error is clearly a major blunder, but Oculus have responded properly.