But wearing a High Luck suit is supposed to increase the odds of getting better results from that same RNG.
From what I can see, wearing the very expensive luck suit makes zero difference to loot dropped and often impacts negatively with the better loot dropping from NOT wearing any luck items at all.
There are a couple of fundamental issues about itemization that put limitations on the potential impact of luck.
1) No item loss means that items pile up, ad people are constantly upgrading to a piece that's a TINY bit better, so, since items have limitations, eventually the range of items that are "good" is small, and the range of items that are "elite" is minuscule.
High luck can't give you much help getting those top end items because if it did... then there would be no more top end items to chase. Power creep is one of the drawbacks of no item loss, and randomized items.
2) Items can spawn at max with no luck. Items dropped, properties and intensities all have hard caps that luck wont break. When you hit the limit on any of them it could be chance or it could have been a luck boost or both. It's hard to tell luck's impact as the game gives you no feedback on that score. I honestly would kind of like it if when you got a luck bump on an item it would simply come in a random special color... the you would know luck worked, and on what item. Plus new rare colors to chase.
3) Going along with my first point, what constitutes a good item is limited, and only as subjective as the market allows. Many properties are generally garbage, and items without a certain property profile (I guess you could call it) are generally just unravel fodder. So you could get a luck boost get all max stats, and still have a worthless item. In fact that is usually the case.