I just wanna say Cinderella Phenomenon, Red Embrace Hollywood and Bandcamp Boyfriend are crowdfunding games and this one is not, which mean the dev have to pay the development cost out of their pocket money, which also why the game cost this high for such a short game.
Beside, not everyone can working to a game for years out of pure hobby, they need money as movitation and kind of responsibility to keep going. You can say it's not worth to you, but it's pretty unfair to compare to other game dev who make game just for hobby because they want to and / or they can handle more workload so they don't need to hire ppl.