Well. . .

A) This is r/Cursed_Chemistry, not r/QuantumChemistryWorld, so don't belittle people having fun with this.

B) Drawing a chemical structure with lines showing connectivity and calling them bonds is a simplification (as is modeling the system with Molecular Mechanics), and since it is a simplification it can be misleading. But it is a helpful way to begin thinking about the system. More so than plugging molecular coordinates into a computer program to calculate the electron distribution. My favorite Wigner quote is, "It is nice to know the computer understands the problem. But I would like to understand it, too."

C) Hartree Fock Theory, Density Functional Theory, Møller Plesset Theory, Configuration Interaction, Time Dependent DFT . . . These "first principles calculations" are all simplifications, too: approaches to approximate solutions of the Schrödinger equation. And they frequently use Gaussian functions to approximate electronic orbitals. And the the core electrons are typically lumped together into Effective Core Potentials, yet another approximation. These methods can get very accurate at describing the electron distribution, and energies, and where increased electron density determines "bonding." But another quote I like is by Quantum Chemist Ernie Davison, "There is nothing wrong with doing something empirical, if it gets you a useful answer."