The answer to your question is given by the EC decision:
> There are also high barriers to entry in these markets, in part because of network effects: the more consumers use a search engine, the more attractive it becomes to advertisers. The profits generated can then be used to attract even more consumers. Similarly, the data a search engine gathers about consumers can in turn be used to improve results.
Simply put, the EC believes that Google is a barrier to any viable competition, so there's no ability to develop a competitive service to Google's own.
Sounds like they're punishing commercial success, i.e. the goals of most public corporations.
Search has been Google's core competency since their inception, they were much smaller than the existing Search engines when they started out but were able to create a better product that users preferred and since that time they've been able to amass a wealth of knowledge, experience and resources. Of course any company is going to have a hard time trying to compete with them now, but I don't see why they need to be punished for executing so well on their core mission.
"""Market dominance is, as such, not illegal under EU antitrust rules. However, dominant companies have a special responsibility not to abuse their powerful market position by restricting competition, either in the market where they are dominant or in separate markets."""
It's not about "punishing" but it is about holding dominant companies responsible for handling the great power that comes with this dominance.
Companies don't usually do this by themselves because like you say, their goals are orthogonal to this.
Doesn't mean it's contrary to their goals (which would be "punishing", in a sense), but "commercial success" or profit just isn't a force that drives ethical behaviour and responsibility. It's not. Things would be so much easier if they were.
Well, I believe the court has considered their position and feels that "punishing" google is not a matter of commercial success but of anti trust law (the "companies don't have inner pressure to be moral" argument).
One's opinion as to whether the court is acting in good faith with regards to its mandate is a matter of faith, I'll concede that; I personnaly have more faith in our individual ability to reorient the court/EUs mandate than to exercise pressure on google/corporations who are filling the new power center that comes with the internet and mass information distribution.
Important correction its not the court its the commission. It seems similar to prosecutor handing down the sentence and burden of proof hence falls upon the accused
