When did I say that they would be "Better on average"?
In your previous post and you are reiterating the same point in this one. I'm not sure how did you miss it.
You are explicitly suggesting that the baseline of "random drops" used as the backbone of the loot table should include +1, +2 and eventually +3 equipment.
I'm saying that I disagree and I don't think it should. Common loot should remain limited to the low tier stuff. Stuff which is supposed to be everywhere in the setting, cheap and plentiful.
Ahh okay, I see, you just want everthing that isn't a unique to always be pure total garbage and never usable in any way, shape or form. You ONLY ever want to see items hand placed into the world ever have even remotely usability.
As such, I guess we'll just have to disagree on this note and end this discussion.
For the sake of economy management, flavor and thematic consistency.
Except that's literally the opposite of what everything being garbage implies.
For economy management, you keep gains low because everything is worthless trash (So everything is then priced low because it's predicated on everything being worthless trash...) then economy gets messed up because if you do make anything remotely valuable accessible (Such as potions, scrolls, unique items) you get overloaded with currency from selling these accessible things worth something in an economy based around everything being trash.
See: BG3 and it's random loot all being garbage but you can still easily buy every single item from every single vendor and still be sitting on 50k+ of worthless gold (Plus full inventories full of unique items worth another 50-100k gold).
For flavour it fails because why would literally everyone only have garbage equipment? Why wouldn't organized forces have actually decent things? Why wouldn't someone have a nice weapon that they use to protect themselves? Especially if these things are commonly sold by vendors.
For thematic consistency it fails, because again, the idea that people only ever own trash is nonsensical. Especially when these things are considered "Common" items and the world is a dangerous place where people will want to have good equipment in order to actually live. Why when you're fighting enemies who have good gear and drop said good gear, would all their containers hold trash that literally none of them ever use?
BG3's creche shows some actual thematic consistency. All the Gith in the creche use magic Gith weaponry which are +1 weapons. Their containers will have in them magic Gith weaponry which are +1 weapons. This is consistency, as what the enemies actually use are what are stored in their containers.
The only thing where consistency would relegate things to be garbage, is for containers found in places where good things shouldn't exist. Like, a poor destitute farmer who has no money and nothing valuable, shouldn't have an armory of potential +3 gear... But this goes back to my earlier point about drops actually making sense. This poor destitute farmer wouldn't even have a weapons locker in the first place for weapons to even drop because he's a farmer not a warrior.
Even then when you factor in where containers that would actually contain equipment are located, you can still adjust RNG chances based on the location. You find a weapons locker found in some ad hoc militia for a destitute village? Well that's going to be mostly trash and rarely will contain something a bit better. While you find a weapons locker in the middle of the main antagonist's military base and it's going to be full of good stuff.
