Users here are mostly referring to their recreational potential while equivalency charts measure their THERAPEUTIC use which measures 5 primary domains- anxiolysis, myorelaxation, amnestic effects, sedative/hypnotic effects and anticonvulsive effects. Some benzos are better muscle relaxants than others; some are more useful as IV/IM anticonvulsants; some are more useful for treating alcoholic dependence than others; some are more subjectively enjoyable, etc
Charts creating equivalencies are inherently imperfect and just try to creating a clinically useful tool to assess dosage conversion for transitioning and so forth. When each benzodiazepine has different binding affinities for several different GABAa subtypes, you can't create direct comparisons.
Furthermore, people have different desires and preferences so of course one person may enjoy the effects of one (determine it has superior potency for them) and try to use that as evidence the charts are wrong. On top of such endeavors being ENTIRELY USELESS, they are about as scientific as determining the whole world is annoying just because Doug is