Trademark laws are different. Owning a trademark does not give you the right to own the domain as well. What these cases comes to is whether the owner of the domain is using it to deceive and trick people into thinking the website is part of the trademark holder business.
I personally don't feel comfortable about corporations having the power to claim ownership by force for any domain that contain their product name. If anything they should pay for it the same way they pay for trademarks in other countries when they acquire them.
I didn't say that owning a trademark would automatically give you rights to the domain name.
However, for a strong trademark, it COULD prevent someone else from legally obtaining the rights (or, more accurately, they could obtain the rights, but when you filed with WIPO to have their rights removed, WIPO would do so).