It's been the end game of fan translation forever. I used to be a manga, LN, and anime scanslator/fansubber in another life.
For popular manga the "meta" today is roughly:
1. Wait for the chapter to be released in China or Taiwan where copyright isn't as broadly enforced.
2. Upload the Chinese raws.
(Steps 1-2 usually happen in a different ecosystem than translation.)
3. Have a Chinese/English bilingual person read the manga and turn it into translated text. These folks are usually pre-teens or teenagers. If this is a popular series, they're under intense speed pressure (the group that drops first wins all the imaginary internet points, or basically all the page views and torrent peers.) The quality of these translations are usually anywhere between average to bad. The kids read barely enough to understand what's going on (given the intense time pressure) and that they're already starting from a translated source (JP -> ZH.)
4. Have your typesetter clean the manga and prepare it for English. This is generally done by also a pre-teen. If they're under time pressure they'll do the bare minimum here to get it out quickly.
5. If you have enough staff and the series is popular, an editor will then edit the text to make sure it makes sense and perhaps rewrite bits to make it reflow into the text bubbles. If you don't, they're often the same person as the TL or the typesetter/cleaner.
6. Upload onto the sites/drop the torrents.
If you can read Japanese you'll realize that a lot of these translations are speed oriented and the quality is quite bad. Sometimes quality-oriented groups will go ahead and revise an already released manga but more often than not once some scanslations are out, others will consider the series "translated" and bad fan scanslations will live on.
When I was active the steps were different; they've changed as they've responded to time pressures. It's already a huge race to the bottom. Most of the big series are getting translated by pre-teens and teens. Some more niche series are being tackled by college students. Doing AI assisted translation is just the next step in an ongoing war to speed up translations.