No, that's definitely not true. Fact is you see more and more new types of garlic in the Netherlands, spec Messidrome, Thermidrome and Tokhagyma because these are suitable for the Dutch climate.
Rotation (6-10 years) is important.
I have my veg garden for over 22 years in the middle of the bulbfields and POTATOE growing was banned for a long time in the dunes due to the bulbs. I am not sure it was phytophthora or rhizoctonia or something like that. But for some years we are allowed again to grow potatoes.