> 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.
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.
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.
Step 2: "more attractive to advertisers"
Step 3: "profits generated can then be used to attract even more consumers"
Wait, why were consumers attracted by the product (search engine) in the 1st step, but were convinced by the profits in the 3rd step?
Just like Toyota in the unintended acceleration problem was quickly found guilty of not being GM or Ford.
Wut?