I don't really like the term "industry plant". I feel like the term is being miss-used a lot by people nowadays. I, of course, will not deny the fact that there are plenty of artists who got more than enough incentives and had the perfect conditions handed out to them in order to reach top charts while in contrast acting as if they worked really hard to do so.
However, that said I still think that the "fabrication" process
of building up the persona of someone to be something more interesting then they actually are (someone that most of the times is completely different) isn't really applicable to that many artists.
Avril Lavigne for instance, before she released her first record "Let go" she was actually already into her whole tomboy way of dressing/acting (heck, even before she denied working with the first record company). Then, 2007 comes along and she started releasing records like "The best damn thing" with the song "girlfriend" which feels as cookie cutter and generic teen girl pop as it can be. Heck… she even dubbed that song (in the most awful way) in like what? 8 different languages? Then she continued her transition into pop and now… she's pretty much only criticized.
One might say "hey but wasn't she a catholic or whatever singing in churches?" so was Justin, but guess what? that's when they were really young (under 18), people grow up and like I said, she had the whole tomboy thing going for her before even working with music professionally.
If anything, Avril was fabricated post 04 into becoming just another overly marketed pop symbol for teenage girls.
Now, the new hot thing is calling Billie Ellish a industry plant as well. I honestly don't know her past, how she used to dress/talk/act back when she didn't work professionally or when she still wasn't famous. So honestly, I can't really give any opinion on her. But frankly, I cannot see how being an "industry plant" affects an artist's work. I can't see how it makes their work less enjoyable or how it takes away talent from them.