The last one refilling detergent is a parody of The Milkmaid by Johannes Vermeer; everyone has seen it on textbooks and it has become a meme template on Japanese Twitter in recent years.
Some of these are very humorous because of the cultural disconnect (as an American, I have never experienced somebody asking to put their seat back).
"An expert on a very niche subject" made me laugh out loud the hardest, because it's the one that's most "just a guy", and yet it's also exactly how it's described.
Maybe this is a different type of mundane costume, but I like costumes that just look like guys. When the anime initial D was popular, I would wear a white T, blue jeans, part my hair down the middle and say I'm cosplaying as Takumi Fujiwara...
I saw video of a costume contest this year where one participant was wearing an Amazon delivery driver vest, flung a cardboard box across the stage and then took a picture of it (all to wild applause).
It's San Francisco, there's a lot of immigration, cultural influence, etc. whereas say Australia has outsize Vietnamese, Indonesian influence; or India in the UK.
1: https://en.wikipedia.org/wiki/The_Milkmaid_(Vermeer)
"An expert on a very niche subject" made me laugh out loud the hardest, because it's the one that's most "just a guy", and yet it's also exactly how it's described.
Yes, a thousand times yes you can put your seat back you gentle soul.
You don’t see this kind of post rise for any other culture.