This option is disabled for myself. Lost a good soldier in a previous campaign during a ratman-base assault because she had like 30+ sickbay days to recover and suddenly had to fight with 10/68 HP.
That is realistic though, its best to let the runts and brainers cart them out on a stretcher while the bad guys are coming in through the other door.
I do got a question for ya though Ethereal, just on speculation... If you leave only HWPs at a base but no soldiers does that mean the base still folds if its attacked? I have since put 1 Lokknar lady in each base just to be safe but I had 3 Tamed Reapers in each one (they're small comms/intercept bases).
In vanilla this wasnt a problem - (I think) I had one base defense mission where the 4 Coelecanth/GCannons I had stocked there were able to defend it without any soldiers. Dunno if this has changed as of OXCE+ though.
Also mite be abit of a bug - but in vanilla if you successfully destroy a ship trying to land you collect all the loot and corpses from it, it immediately jumps to the debriefing report. But I dont believe it does this in OXCE+ or X-Piratez... which is kinda a big loss if I do say so.
Another thing about cheap base defense, when you get Refinery the chemicals become very easy to get and that means lots of explosives like barrel bombs. Ive heard there are special tiles that can destroy a facility if they are broken... do all map blocks have these or is it just certain facilities like the Lab/Power Plant etc that do. Because the Hangar is a perfect place to blow the hell out of stuff but I should know if its got a do-not-touch tile on it.