I'd say that you are confusing the concept of encumbrance with the D&D implementation of encumbrance (which is almost unchanged in 50 years when actually used). There are better versions of encumbrance out there, that among other things help you visualise the character.
Anti-Hammerspace uses bulk not weight and makes the character much more visual, and the Blades in the Dark system rewards gives you plot coupons depending on your encumbrance weight and class (you take a light, medium, or heavy load and then get a number of uses of class-appropriate equipment depending on your load with how visibly you're equipped being based on the load you chose).