This statement is interesting, considering what it implies about the purpose of existence of producers for each respective side. With this stance, US is more like "producers exist to satisfy needs of customers", while EU is "producers exist just to compete with each other".
Once basic life needs are met, optimizing for customers tends to only good for someone who is living off their savings/welfare/etc. Optimizing for employees is good if you, like the majority of the people on Earth, have to work for a living, or are supported by someone who has to work for a living.
Everybody eats food, pays taxes, pays tariffs, and benefits from the protection of the military, but 300 million people who pay marginally fewer taxes and tariffs, eat marginally cheaper food, and enjoy the defense of a marginally more effective and efficient military are often "outvoted" by geographic concentrations of tens of thousands of people who have substantial vested interests.
Given this inherent bias in democracy, I think it makes sense for policy to at least try to favor the consumer over the producer, just because producers do a good job taking care of themselves already.
The US sees anti-trust as necessary when consumers are negatively impacted. The EU sees anti-trust as necessary when producers are negatively impacted.
The latter is, of course, always colored by politics.
I will also note that the nature of the social network market, with its network effects, means that a large enough system with a closed API is, under those constraints, by definition anti-competitive - certainly to producers, and possibly to consumers.