And yet, you think being able to see already discovered systems should be a feature in the game. Why would you think that if you also think it gives no advantage?
I think it would be a QoL feature yes. Not an advantage to avoid a challenge. Like having a supercruise button toggle, a relative mouse button toggle (or option when to have it when you switch to FA off), a button for request docking....
Quality of life features are not to avoid challenge. That's why we call them "quality of life feature" and not "easy mode".
I never found it super difficult to jump in a system, realize it's explored, then jump to another. Also, as mentioned earlier, I can get a few thousands LY now and not find many explored systems at all.
However, new players are kinda limited in range, and since explorations have been going around the bubble for literally years, it takes them a long time to go out of the explored zone and pray for the best. I looked at the feature to explore when I was a noob, and I didn't find it.
I don't think randomly jumping made me a better explorer than exploring unexplored system. In fact, it's the opposite.