Agreed with above. I already sorted out the most egregious offenders (Stacks of 7 trays, you will not be missed) and added unique items in a PR some time ago, but intentionally left some degree of junk in there. It isn't a treasure trove; it's predominantly a mundane storage area that sometimes has some fun and unique things in it. If quantity is an issue, we can look into reducing the number of items overall. Frankly, though, the cargo culture of "everything must be sorted perfectly and sent out" is as ridiculous as it is irritating; however, I cannot deny that you are right and for whatever reason, it has been ingrained in the minds of QMs, HoPs, and cargo techs that this MUST be done and everything that can be shipped out should be.
I can look into tweaking the amounts, items, and frequencies again, to reduce some of the tedium, but I am going to say this right now; the warehouse will always feature more or less useless junk as its majority. That's not going to change, because that's what the warehouse is for. No amount of coding is going to remove the frankly strange and irksome tradition of "you must sort fully, you must ship everything." That's up to the players.