I'll probably make countless variations of this video. It seems to be a problem for other adults that their peers choose to play or be playful. Why is it such a big deal? Play can be paired with being childlike, and somehow this is inferior, or a sign that someone hasn't learned how to "adult" correctly. I disagree. I think play is healthy, and has wonderful benefits for individuals and relationships.
https://www.theatlantic.com/health/archive/2011/10/all-work-and-no-play-why-your-kids-are-more-anxious-depressed/246422/
https://www.psychologytoday.com/blog/freedom-learn/201001/the-decline-play-and-rise-in-childrens-mental-disorders
https://www.psychologytoday.com/blog/conceptual-revolution/201611/play-if-your-mental-health-depended-it
https://www.helpguide.org/articles/emotional-health/benefits-of-play-for-adults.htm
https://psychcentral.com/blog/archives/2012/11/15/the-importance-of-play-for-adults/