That's not a bad thing, that's just a you thing. They aren't the same. A bad story telling decision here would be like if the man had no reaction to the city's plight like a sociopath for no discernible reason. He's obviously not character with that sort personality and this isn't a metaphorical manga on post-modernism either. It ain't that deep.
I mean... that's was all I was really saying with different words.
It's slice of life. These are all mostly self-contained short stories with a subtle continuity as to not overwhelm said short stories with needless sub-plots or grandiosity. If the author did what you suggest, it entire appeal would fall apart. The "isekai" portion of the story barely exists as it is. To do the opposite would make the story utterly indistinguishable from 'alt-isekai subgenre #829'. It's a vibe, not a binge like the rest.
EDIT: Grammar