The thing is that despite the former's departure from a lot of conventions in the genre, Path of Exile and other action role-playing games still stay faithful to the basic formula, that’s why they have a lot of commonalities. For example, in order to get stronger, farming is an important part of playing an action role-playing game, wherein you gather experience and poe items. There is another thing they have in common in farming, and it's exhibited by players themselves.
Whenever an undervalued or common item gets dropped, they're ignored. It may be a waste of time and inventory space to pick them up, and even more time is wasted when you pick one up and have dropped it to free up more inventory space. In action role-playing games, this is something that you'll see all the time, and a few of more released ones have clued into this and taken measures to make sure that there are lots of Path of Exile Items drop to be ignored by decreasing PoE items drop rates and making sure that better items are dropped such as poe exalted orb so that there are more chances of them getting picked up.
In the case of Path of Exile Items’ unique economic system, a lot of those items are POE Currency items that are pretty much money. Of course, most people would like to pick them up since they're of value and can be combined with other value poe currency items to make more valuable ones, for instance, poe chaos orb. However, there are some players out there who have gotten so rich that they don't bother anymore.
Since some valuable poe items don't take up that much space in the inventory. You can see players who don't pick up smaller amounts of gold that get dropped in other action role-playing games. The auto gold pickup has been implemented in newer games, so players don't have to think about it anymore. Perhaps, you can buy safe poe items from a reliable website each time, you will save up more time that you can use for fighting bosses and do other important things in the game.
Remember that when each item dropped, a decision is made to whether pick it up or not. It adds too much of decision-making that goes on in the game, including combat and elsewhere. You can make it easier by not picking up anything at all for yourself unless it's a rare or unique item, but that still amounts to a micro decision for each item drop as you play. It's not to say that this process should be a bit stressful, but it does show how things work in most action role-playing games.
Really, it’s not a problem that needs any addressing. It's just an interesting behavior that you see from players in the game, and it's worth noting why it happens and what goes into that way of thinking. By paying attention to such small details, you will form your own hypotheses in your head and test them in the game. Hope you enjoy this game. For more helpful poe news, please visit MmoGah.