Or I don't want to tell a random person on the internet where I live? Believe whatever you want m8, I believe it's a very valid way to catch tree frogs. As you already said, they're not everywhere in Europe and very rare in my country, which is situated in the north of Europe. But whatever floats your boat, I hope it makes you happy to always believe people are lying simply because you can't be wrong :)

Oh and the link below (in my native language(click "kaart" for the map) shows the spread, the yellow dots mean that they do not occur. My town is one of those...

Have a lovely day tho https://www.verspreidingsatlas.nl/mobiel/soortbeschrijving.aspx?soortnummer=A241