I spend a lot of time in the SRV and my raw materials are almost constantly completely maxed out, purely from surface minerals.
If I'm missing something specific, sure I can trade down, but I cannot think of anything I can't pull out of the ground at 30-60 an hour within 100ly of anywhere. The time it takes for my longest jump range ship to traverse 1600ly is invariably longer than it takes me to track down most anything specific.
Metal rich and high metal worlds aren't better for arsenic, probably because arsenic is not a metal.