One anomaly in the weapon tables in D&D 5e is the weight of the Maul, Pike, and Greatclub -- they all go into double digits, which is awful heavy for a melee weapon you're expected to swing around (or jab at people with in the case of a pike) all day long with a decent degree of precision.
For instance, Wikipedia pegs the weight of real-world pikes as anywhere from 5 to 13 pounds. Taking the average of this range, we get 9 pounds, which is half the weight the PHB weapon table gives. Likewise, the Greatclub and Maul tip the scales at ten pounds – while ten pound sledgehammers exist, I have a bit of trouble imagining how one would wield a hammer that heavy effectively considering the long swings needed when using a hammer that size as a tool. In addition, it'd also be rather impractical to wear on one's person, as would be the norm for an adventurer (who likely is sans retinue of squires to do things like lug weapons around on their behalf).
Is there some sort of design intent (perhaps related to encumbrance) I'm missing here? Or would hacking things by cutting the weight of all three aforementioned weapons in half while not changing their damage die be a reasonable houserule response to this seeming irregularity?