The whole point is that "your" logs contain personal data about others. That data is theirs not yours. Moreover if you get asked about "your" logs by the US government you have to hand "their" data over to them, for which there is no legal recourse for the person owning the data.
To make this more obvious, the EU is essentially saying that you can create a post service that routes all their letters through the US where they can be opened by the FBI, without any legal recourse.
I'm always amazed how people (even very technical) argue that things are perfectly fine for electronic data when they would completely oppose the same thing for physical things, e.g. letters. I guess years of propaganda have worked
