Moisture in the laundry room - ventilation or dehumidifier?

Is the rule that you should only ventilate the basement when it is cooler outside than in the basement generally valid?
What if it is warmer outside but the air is drier than in the basement?
Currently, it is 28 degrees and about 40% relative humidity outside during the day. The basement is at 19 degrees and about 60% relative humidity.

This is how you ventilate even more moisture into the basement.
There are converters with which you can see how the humidity increases when the warm 28°C 40% air cools down to 19°C.

Alternatively, a dehumidifier that also has a condensate drainage.

A permanent solution would be a duct fan with heat recovery.
Alternatively, a dehumidifier that also has a condensate drain. However, these are not cheap and consume more electricity than a duct fan.
Otherwise, you have to empty it at least once a day.

Do you actually read what others write or just complain? A neighbor like you and you might as well start looking for a new house...

Costs us about 3.8kW per day...