Different design considerations. Tank-type or whole-house instant water heaters are common in the US. Point water heaters with the plumbing being cold-only are more common in Europe. Hot water might not be available in (say) a utility room.
On the other hand, US houses might not have the wiring required to support a washing machine heating coil in the laundry room. You’re talking probably 30 amps at 240V, if not more. Whereas a standard North American washer runs at 120V/15A. Same with a gas dryer.
