They are not forcing her to join, they ASKED her if she wanted to, but she refused. So the staffs asked her that she need to stop doing that but she also refused that. Many groups have a rule of no one should steal any other's works, you know?
It's a big slap to them who worked hard on the previous chapters then out of nowhere someone stole it. When they can asked if they can continue the series.
Translator, translate the whole thing with their knowledge and also provide translation notes. Proofreader fixed the grammars and to shorten the sentences so that it is pleasing to the eyes of the others. Cleaner and Redrawer cleans the whole dialogues, SFXs, and replace the missing art which are cleaned. Typesetter, typesets/puts appropriate fonts for dialogues, speeches, and of course the SFXs so that it will turn out close as possible to the raws. And lastly, Quality Checker, recheck the whole thing, if he/she can find any missing pages, texts, and etc., QC mostly have the skills of all the above.
So, with a team of those, they provide high quality release so that everyone can enjoy, pleasing fonts, grammar, and etc. But I guess that most of you wanted faster release than quality, huh?
You probably don't know the rule of sniping because you haven't join any discord groups which they often talk about that thing. If 6 months already passed and they haven't updated the series, everyone can now freely translate that.
It's so upsetting that a lot of you can't wait just for a month for the updates when it's only been a MONTH, there are a lots of manga/manhwa/manhua that took a lot of time to update but not everyone complained about that. And look what we have here? The uploader puts a note and then most of the commentator forgot their manners and said that it's okay?