Yes, cheap or tier 1 commodities are worthless. Its even worst when you think there's no economy chain at all.
They're only worthless in terms of credits and even then they can be used to get to one of the more lucrative routes so a player doesn't lose money. If everything rewarded the same, or even with only a small margin of difference, things would get tired really, really fast.
Some also have other uses but they seem lost on many because there is no instant gratification so they don't see the effect they can have, especially if efforts are co-ordinated.
I don't profess to understand everything about how certain good's can affect other factions, both in a good and bad way, or even when they might be at their most useful but I see enough in the game for me to hunt about and try different things, checking out their States and Governments among other things to keep me amused.
Prices rise and fall all the time in this game. You trade a low cost item too much and the price can skyrocket.
Players just want to do it the easy way these days. Back in the original games it was all about the learning and that's one of the main reason people played it so long.
I'll be honest and say it's not all it could be but I think a lot of what is in the game currently is being overlooked because a lot of players think that it's all about farming credits as fast as you can and that will get the rewards you seek, when it's not all about the money.
They said in the recent Trading live-stream that they're looking into ways for prices to be more dynamic which would be great, especially if tied to a disaster, may it be a basic famine or something affecting the supply of some good.