That's a good point although it's not that it is bad exactly, more that the time it takes to afford the Advanced Scanner in a small ship is quite minimum compared to the time that can be invested in exploration. For example, we only need to trade about 100 T of rare goods.
What might be a better system, in order to promote the skill of using parallax, could be for the Advanced Scanner to progress in range from a starting 1000 ls up to infinite/huge number depending on a metric. Perhaps based on the radius of discovered objects such that finding one at 2,000 ls increases scan range by a fraction of 2,000 ls. I like the convenience of the Advanced Scanner but I feel like the absence of using parallax is lost content.
trouble is you can't use the parallax technique to find black holes, it's a nightmare with the intermediate scanner when you know there's a black hole but can't see it