the reach of US law enforcement is global
In theory, yes.
In practice, governments struggle to close a lot of much more high profile websites.
The Internet, and now Bitcoin is highly censorship resistant.
Not if you feel that bitcoin presents a genuine threat to fiat & the moneyed elite.
If bitcoin truly is a disruptive technology, why wouldn't the powers-that-be pay close attention to it & try to nip it in the bud?
OTOH, if it is just another horsefly not worth a tail swat, you got a point.