... what? That's 11.000 kWh a year. Even in Germany, with water heating by electricity (which is rare because it's just so inefficient), homes rarely hit 6.000 kWh.
[1] https://www.energie.web.de/ratgeber/verbrauch/stromverbrauch...
Also, way less efficient hot water cylinders
The link you posted even mentions a range of 14,000 - 28,000 kWh for houses not built for efficiency.
Entirely depends on the number of accommodation units per building, installation and ongoing maintenance cost of heaters and metering equipment, availability of gas and/or district heating, etc. It's certainly uneconomical to send heated water through expensive copper pipes in a building inhabited by only two singles when it's needed only for a shower in the morning, yet has to be kept running for hygienic reasons the remainder of the day.