[Yo-Yo]

Lower temperatures increase conductivity, but slow down chemical reactions in batteries and cause humans to thaw out their frost-bitten toes with excess heater use.

EV manufacturers have moved from basic electric stip heating to freon-based thermal heat pumps to generate cabin (and battery) heating.

Heat pumps use less electricity to create the same amount of heat than electric resistance heating strips. A heat pump is basically an air condidtioner run in reverse.

[Jeff Chandler]

Heat pumps don’t work as well in cold conditions.

[Chad C. Mulligan]

EV manufacturers have moved from basic electric stip heating to freon-based thermal heat pumps to generate cabin (and battery) heating.

Heat pumps don't work when the ambient temp is below freezing.

[cymbeline]

“Heat pumps use less electricity ...”

They don’t do well when it’s real cold. Even if they are warming more cheaply than electric, the warmed air is not very warm (unless electric coils are also turned on).

[fireman15]

Heat pumps use less electricity to create the same amount of heat than electric resistance heating strips.

Unless it is extremely cold outside... then they basically don't work. This is why heat pumps in places where it gets cold frequently are backed up by conventional heating. It sounds like whoever tutored you on this subject left out a minor detail or two.