Well the funny thing about abstractions is they are physically real in our imaginations even if only ephemerally.

Human imagination allows us to explore as a simulation anything we want with a form of physicalized internal coherence.

Does internal coherence align with repeatable external coherence? That's what we call empirical.

Humans are the known meaning generators of the universe, we are interesting and special and our unique/random walks are important in an uncomputable and unbound sense. Who knows what casual chains will lead us, where they'll take us or how they might save us (from asteroids let's say) or might reshape the topology of spacetime.

It's early days yet.