Continuously repeating doesn't make it any more true at some point... What you want is basically that cheater button right next to some decent exploration tools. It pretty much reminds me when back in the days, when the ADS just was introduced and I was the one weeping and lamenting about the nail in the coffin to the parallax method. It were the same people, the same mindset that told me "hey it's still there, you still can use it if you want" without understanding that the old parallax method would suddenly feel like shooting in your own feet.
No thanks, not once more! Not such a foul deal towards the elimination of any gameplay. We also don't need any more inconsistencies, which the parallel use of both methods clearly would be. And since you reject the only acceptable compromise - both methods mutually exclusive - it now can only mean for you: No dice!
I used the parallax method a few times & quickly decided I would save up for an ADS before exploring further, I stuck to the bubble & used things like NPC wake signatures to find planets.
I mapped a moon a few days ago (I told this story in another thread) that had some geological activity I hadn't come across before, might have been Nitrogen Magma. I fired off the probes & resumed my travel towards it while I waited for the POIs to resolve. The game crashed & when I returned the body was 100% mapped but all my POIs had gone. I never saw any on this moon but other mapped moons lost theirs too.
So I dropped down anyway & went to look the old fashioned way. I've spent days pouring over bodies all over the galaxy, found maybe a dozen before 3.3, I can do this. I gave up after 20 minutes, the probe/mapping feature sucked the enthusiasm from me.
So I understand how you feel, and I hope you can understand that in the same way that I really don't want to manually search for fumeroles by eye any more, I also don't want to have to DSS an entire system just to find out what's in it, discover nothing interesting & move on.
The ADS gave me the top level info I wanted, just as mapping a moon gives me the POIs. This is an analogy to help you understand.
Now if there were some fundamental incompatibility as several have said, it would be understandable & acceptable that the old system make way for the new overall far superior one. But I looked into this and there isn't one. The only circumstances where the ADS/FSS combo gives an advantage are so rare that the decrease in jump range alone makes the FSS the meta.
The ADS has been removed for no reason other than because some people don't like it and don't like the way others play with their sandbox toys.
It didn't need to be removed, it should not have been removed, and the pre-3.3 discovery process needs to be put back into the game.
With a built-in FSS most players will be very happy. The new discovery process is an enormously capable farming device even without mapping, and the ADS can complement it to make the initial system discovery easier, or the more experienced player can go without & be at an advantage in power requrements & mass, and gain a valuable extra module slot.
There really is no downside to having the new system add to the pre-3.3 one. It maximises choice, it overcomes many of the objections players have raised about the FSS, it is the optimal solution where all players will have the ability to choose.