Epic's behavior has been consistently ethical as long as I can remember (and I've been following them since the 90s). The reason Sweeney is an interesting person is that he has been developing the industry (not just his company) for the past 30 years, and has interesting things to say based on that experience because he has a strategic vision and also continues to be deeply technically involved (he was the original architect of the Unreal Engine and continues to personally design tools and entire languages/frameworks for game engines). He was a technical founder role model long before pretty much every operator on scene today even started their career.