Fansubbers these days are a tiny shadow of that they used to be. The vast majority of anime piracy these days consists of ripping official streams, which include subtitles.
Of course, if you're into older shows, you'll find many to be missing on the mainstream streaming platforms, and will often need to resort to piracy and fansubs to get that. But as anime becomes more mainstream, those interested in older stuff become a smaller slice of the market.
Also, due to more mainstream adoption, those interested in "cleaner rips, better encoding, etc" are dwindling. Whilst these people are still out there, you'll find the vast majority of people are perfectly happy with low quality streaming sites (also worth pointing out that these streams still offer vastly better video quality than what you typically got in the 90s).
Enforcement wise, I doubt they're targeting the hardcore fans - they're going after the mainstream, which is a big slice of the market.