There's a huge class of structures that can be built but not grown.

When you see a marvelous grown structure we marvel at its precision and detail. "How did DNA encode that?"

But it's a subset of the set of structures that is viable to grow from only simple rules.

That's why building a living thing is so hard.

Things that look the same are infinitesimally different in critical ways.

You can only bud a living thing off an existing living thing (with astronomically rare exceptions).

The subset of things that can be grown out of simple auto-generating structures is way, way smaller than the class of things that can be built.

You don't get to decide what things are capable of blooming.

You just get to decide which blooms to keep.