Why are mole ratios central to solving stoichiometry problems?

All chemical reactions conserve (i) mass, and (ii) charge. It is convenient when we consider the stoichiometry of a chemical reaction to consider the mass in terms of moles, which necessarily represents a number of reactant and product particles, and thus also a mass of same. And this is why educators go to such lengths in teaching stoichiometry. If the reaction ain’t balanced with respect to mass and charge, it ain’t a model of reality. There should be many answers here that deal with stoichiometry.

Mole ratios are central to solving stoichiometry problems because they allow us to convert between the amounts of reactants and products in a chemical reaction. They provide the numerical relationships between the different substances involved, enabling us to determine the amounts of substances consumed or produced in a reaction based on the given quantities of reactants or products.