I would argue that the choice of L- or D-molecules is not a physics question so much as a chemistry/biology one.

Even if you have an equation, doesn't mean you can solve it. N-body problem is a perfect example.

You cannot determine all the Parameters of the equations accurately. Changing the parameters could drastically alter the output behavior. Finally, you don't know the initial conditions too.

These are the challenges that classical physics have to deal with. Quantum is not even factored into, yet.

Welcome to the land of Nonlinear Dynamics. We have bifurcations, strange attractors and of course, whole lotta chaos.

iirc L-aminoacids and D-sugars, that is these observed in nature, are very slightly more stable than the opposite because of weak interaction

probably it's just down to a specific piece of quartz or soot that got lucky and chiral amplification gets you from there

also it's not physics, or more precisely it's a very physicy subbranch of chemistry, and it's done by chemists because physicists suck at doing chemistry for some reason (i've seen it firsthand)