> Biodiversity does not directly benefit everyone, while global trade does.

Biodiversity is an intrinsic aspect of ecosystem stability. The earth's functioning ecosystem is literally necessary for life on earth. All that "free" value in the form of plants and animals that produce our food, photosynthesizing organisms that produce air, decomposers that produce soil, etc is the result of coevolution of diverse organisms. When that system becomes unstanble or unbalanced then mass extinction follows.

The human economic ecosystem is built on top of a functioning biosphere. You can't just replace what the biosphere provides with industry or trade.