"Build an ecosystem, not dystopian sprawl"

Create a garden, not a wilderness. OR (depending on your audience) Build an ecosystem, not a garden.

An ecosystem, not a Superfund site.

"Build a universe, not a multiverse" could capture the meaning pretty well, in my opinion.

Build an ecosystem, not an experiment.

Build an ecosystem, not a science project.

Build an ecosystem, not a microbiome.