Giving people in power broad discretion with the law and then counting on them being nice is a delicate strategy. It counts on every administration being benevolent.
> Romania could just have used another law or just made a new one to harass the press
There is a big difference between using the authority of the EU, through an EU regulation, and passing a domestic law to go after people you don't like.
More broadly, this argument can be made against any over-reaching law. Just because some hypothetical law could be bad doesn't make an ambiguous law granting widespread power to select bureaucrats okay.