The 'losing your data' thing reminds me of an old war film where the heroes go behind enemy lines, do whatever needed doing, and come back at the end, wearing German army uniforms, and approaching a British sentry with their hands in the air. The guard rakes them all with his machine gun, and all his CO has to say in recrimination is "Well, don't do it again!" So much for pathos.
But my point is that it really should be a bigger deal when an explorer returns to 'the bubble' with invaluable, perhaps irreplaceable, scientific data, and it's all lost because someone was trigger happy. In reality, someone would implement a system to discourage such actions. Like, a 'black box' in every ship that registered when a scanned ship was carrying a significant amount of data, leading to a humongous fine/bounty if the player then attacked the ship (and maybe a reward for assisting it, if there was a way to do that?), or even the shutting down of the attacker's systems for a few minutes. Few players would enjoy the notion of such a 'nanny box' on their ship, especially if it malfunctioned, but I think that would be the reality for a culture that had achieved common place space travel. No-one can really go it alone when cold vacuum is a metre or so from your face, and it's not so difference from attacking a ship before you've scanned it.
Even if that didn't 'fly', the aforementioned 'black box' could hold all the cartographical data, anyway, and survive the ship's destruction, just like its pilot apparently did.
It just doesn't seem to me that realistic, that data is so perishable.