Why subtitle text reads so badly
A subtitle isn't cut where the sentence ends, it's cut where it stops fitting. The rule almost everyone follows is two lines of around forty characters, held on screen long enough to read, and that splits sentences in half with no regard for punctuation.
That's why an SRT opened in a text editor reads in fits and starts: loose numbers, timestamps in between, sentences broken every second line. The work here isn't stripping the numbers, which is the easy part — it's putting back together what was split, so what's left reads straight through.