While you do have a point, I still think having probes that are actually spent would at least make me care when launching probes, though.
But you just said that the insignificant fuel cost makes it a pointless gimmick. So that make your idea work, it has to be a non-insignificant, or signficant, cost to it. So what would that be? And how do you think people would respond to it?
I dont mind the concept of scavenging being needed for explorers at all, but I'd prefer if that is for repairing the ship and such. So it feels more like an adventure on its own, rather than a never ending chore. Needing a significant investment in probes reminds me of the endless grinding for jump fuel in NMS. Its fun a few times, and then it becomes a mindless activity that makes you eventually just give up on the whole thing.
I was under the impression that you wanted skill-based gameplay.
Infinite probes isn't skilled, it's 'spray-and-pray'
Except now you get a bonus if you are skilled. With your idea, you just need to grind a bit longer for the same result. To me, skill-based means greater rewards for greater skill, not being forced to just grind a bit more skillless stuff to get to the same point. That is not skill, that is tedium.
I guess it partly depends on how you define things, but I feel FD has lately been honing in on what many people have been saying: skill leads to reward, and tedium should be limited.