This is how it works:
Aircraft used to only carry a magnetic compass.
Because the aircraft used a magnetic compass, the runway directions are marked for their magnetic heading (that's why they change from time to time.)
Because pilots are interested in the wind relative to the runway, and the runway sirection is magnetic, the wind on the ATIS and on Tower reports is always given in magnetic.
When pilots fly from A to B, however, they are usually looking at a map, and as the magnetic variation changes with geographic location, maps are always orientated to True North, so forcast winds are always written with reference to True North.
Some aircraft navigation systems display the wind in True North only, some in Magnetic, and some in either, depending on the configuration!