But as a thought experiment, if you were a lawyer tasked to argue this was publicly good, what could you even say? Content creators deserve money for creating content. Aggregators are stealing some of that value and that's inefficient but currently unenforceable? .... I just can't even think of another reason.
Maybe this is protectionism (both nationally and of existing enterprises). French publications are upset they can't get more of the pie from Google who is US based. EU publications in general are upset that aggregation theory ( https://stratechery.com/2015/aggregation-theory/ ) has taken hold and distributors like publishers are getting wiped out.
This will surely accelerate a trend that Google is already doing without monetary incentive: creating their own content and putting in on top.