There is a remove-rows command that you can pass the missing sets into. The missing sets themselves are roaringbitmaps and they have an .or member or you can use ham-fisted's set namespace to union the sets together. As far as clojure core on the rows - yes for sure and if they don't work exactly right that is an issue with TMD - you can and note there are functions such as row-map if you want to work row by row.

drop-missing in tablecloth does this job. https://scicloj.github.io/tablecloth/#Drop39

If you pass a column selector it will act as subset