Hello everyone,
Hubertus is right, insulation on exterior walls does not cause mold; surface temperature and indoor humidity must "match" for a wall surface to develop mold. Incidentally, insulation increases the surface temperature of interior walls and thus tends to reduce the risk of mold. What can become problematic: the airtight envelope of modern houses. Airtightness is important to retain heating energy inside the houses. Used and humid indoor air (plants, bathroom and kitchen, pets, people contribute to this) must be ventilated. If ventilation is insufficient, excessively humid room air can condense on cooler wall surfaces, leading to a risk of mold.
I also know the slogans like "eco-terrorism," "insulation mafia," "insulation madness," etc. In these cases, things are "explained" to laypeople in a flowery populist way, causing a specialist to shake their head in disbelief. That belongs in the same drawer as 9/11, moon landing, and other conspiracy theories.
If you do not want to insulate your house, that is your choice; then you build with insulating masonry units, build thick exterior walls, etc.