Why? Because they are most of the times blatantly wrong and don't even mean a thing. If you do simple caclulations you realize that some rare materials show up 20 or even 30 times too little compared to what the planetary scanner gives you (for example you should get roughly 1 Selenium out of 4 Chromes (2.5% vs 10%) but you get 1 out of... 87), while other show up 2 or 3 times too often. It's random, it's really frustrating, and it's complicating the already annoying grinding process.
So, either the real occurence or the shown percentage must be amended so that it reflects reality.
So, either the real occurence or the shown percentage must be amended so that it reflects reality.