I figure they do that because once upon a time some idiot was going down Long Holy Crap Hill. As they were coming up on an EV charging station, they read on their pilot panel that they were getting 87.3 miles per kWh, and since they had a whopping 44 kWh remaining, they figured there was no problem going on to the next charging station, some 630 miles away. Litigation ultimately ensued.
As a side note, as they drove through Holy Crap Valley on their way to the up side of Long Holy Crap Hill, they stopped at McDonald's and bought a scalding hot venti coffee, which they nestled between their legs to keep it handy and warm.