TBH I don't care about the lore explanation, I care more about the gameplay and having unlimited probes removes the challenge from the mapping mini-game. Everyone will literally start bombing planets with probes.
That's why they have the efficiency bonus.
"I want a challenge"It's just a credit bonus feature. And Exploration is not about Credits!
"There's an efficiency challenge that gives you a credit bonus"
"I don't want that challenge"