There was only one of their video I felt awkward was their video about the fact we will tackle climate change, I felt like they were I little too techno optimistic. But given that they have a good history in this subject, I just felt their goal was to provide optimism.
Also, I’m sorry if I’m overly paranoid but I feel strange that you created an account just to make this comment.
https://www.youtube.com/watch?v=HjHMoNGqQTI
The optimism you mention in your comment is key. Conditioning the public to perceive and blindly accept the ideas and procedures commonly discussed in many of their videos as something net-positive seems to be the primary goal.
The art-style I think plays a very well-defined role in that: yes it's bland, but it's the most unlikely one to offend any one average viewer, irrespective of nationality or culture. It's just cute 2D flat birds after all.