Yep. This is why I prefer rather broad strokes simulation.One of the things that gets undersold when it comes to how we represent things in our games is not accounting for cognitive load, our ability to reason about things and pure practical play.
Both Worlds Without Number and Pathfinder Second Edition use abstracted encumbrance systems. Are they more accurate than ones we account for exact weights? Not really. However, the numbers are much easier to use at the table, much easier to reason about and take less handling time. An encumbrance system we use will always be more accurate than one we do not.
A system that is painful to use or more trouble than it's worth will not see use at the table. We're going to end up ignoring it most of the time. Sometimes we end up with more accurate simulation in play by using systems that help us manage the load, so we do not end up eliding it.