Even if theism is a failure, it's still superior to atheism

[Jehanne]

I imagine the amount of water the tree’s roots have to draw to pump up the trunk at any instance would affect the immediate height of the tree by considerably more than one micrometer.

Considering the shape of the earth is not exactly at large scale hydrostatic equilibrium thanks to stiffness or viscosity of the earth and lunar tides, the variation in gravitational forces acting on the tree due to lunar tide probably affect the height of the tree by more than one micrometer.

The concentration of CO2 to sustain the tree would need to be factored in, also. Big trees need more CO2.