I wasn't putting that behavior in the category of "inactionable"! I had also thought there were more discrete conversations, but rereading it's really excerpts all from (presumably) the worst one. But, the article does provide its own accounting:
> text-chatted with 17 men ... and seen the genitalia of 11 of those
So even though two thirds are doing something that could be straightforwardly prosecuted, it seems like one third are still abusive in some way that isn't necessarily easy to write into law, especially one that won't be worked around.
FWIW "regularly prosecuted" doesn't necessarily mean that the chance of an individual prosecution is high!