If a catastrophic failure occurs and completely floods the unit then yes bail out. If water gets into the counter lung that depends on the unit and the amount would be covered in training. Water in the loop happens and most rebreathers you can deal with that easily. I dive a rEvo which is a great unit it but a draw back is poor flood tolerance meaning, if I get a moderate amount of water enters the unit I would have a problem. So if i brain fart and take the loop out with out closing it and water floods it Im probably going OC. Take a Meg that has a T piece connection into the counter lung. I brain fart and water gets into the unit. In this case there is a good chance that water is only in the counter lung and has not made it to the scrubber. When in doubt bail out is a good method but when you cross over to the technical side things are not black and white and when something happens options must quickly be weighed. If you are 100 ft down in open water bail out call it a day. Say you are 200ft down in the middle of a large ship in the engine room, you an bail out if need be and make your way out. Say a reg fails no you are between a rock and a hard place. If you only have a partial flood and it can be cleared you have now left your self options. That is not always guaranteed and you may have to bail out, but if you an better your odds that can help. It is impossible to eliminate risk it can only be mitigated which yes leaves us open to lawyers who could tear apart wording with easy, but if we only did what would keep the lawyers off us we would never get to dive.