Is the dutch healthcare system broadly against hypnotics? Culture (of the country or its medical system) can massively influence prescriptions or their lack thereof e.g. france is pretty famous for prescribing hypnotics very easily (and having a broad range of them), while the UK is generally a lot more reluctant.
True, for example in Switzerland you can't really get melatonin, even if you do it costs an absurd amount (like 100 chf). Doctors seem to be really against it in Switzerland.
I personally take 0.3 mg, two hours before bed. I've done this for about 2 years now. It still works. I know, anecdata, but as you can tell the dose is low.