If I open a CSV with pandas in debug mode I’m also pretty much free to play with whatever transformations I want, without being restricted by SQL syntax. Saved as a parquet, reloads are also pretty much instantaneous.
Not everyone is sold on and proficient in those tools. Honestly, whenever I think I need pandas I try get into it and spend an hour in the atrocious docs before giving up and realizing I could have done that "simple" grouping or filtering or graphing by using other tools and have been done already by now even though it would have "taken longer".
Same goes for all these NoSql DBs. E.g. I realize afterwards I spent 2 hours researching how to do an effing join between two different documents. Time I could have spent deciding on a relational entity model and putting down the ORM boilerplate for it. /minirant