Gravity is the macro-scale effect of non-euclidean space Balls rolling in curves on rubber are the macro effect of the rubber not being flat.

Space has a tensor field of the locally correct lorentz transform. Rubber has a vector field of the local gradient. Both are derivatives; the fact they aren't constant implies non-eulcidean geometry

The laplacian (second derivative) of space appears made discontinuous only by mass-energy Ditto rubber.

If it isn't mysterious why rubber sheets get distorted, then it shouldn't be mysterious why space is distorted. Both are minimising the deviation of second derivative from a specified forcing, and have dynamics for the forcing over time. They are identical processes.