Seemingly smooth surfaces become scratched and dulled from daily abrasion that in turn creates micro hiding places for dirt, oils, and bacteria. The condition worsens in a short amount of time and creates an unacceptable floor that cannot be cleaned by mop and bucket. When you wax over this ugly surface it only seals in the worn dirty look.
The newer ceramic tile flooring creates a problem on two fronts. First, the tile surfaces are engineered with more texture than ever before making the mop less useful and effective. Secondly, and even more noticeable and problematic, the grout between the tiles has even more texture to trap dirt residue left by mopping.