Her opinion is right but this article should not have title "Former Trainee" since she didn't accept the offer to be a trainee.

Yeah.....
It's a real crap-shoot (and always has been but even more so these days with the saturation of too many K-pop groups/solo artists all competing for eyeballs/ears/cash).

Not every K-pop artist or group will be able to make it to the point where they're able to finally pay off their trainee debt and start earning money for themselves - basically, it's still indentured servitude.
You only have to go to any online K-pop site that has records of groups and see those which managed to debut but then get disbanded soon afterward - or even never manage to make it to their debut at all. There are many more than you'd think in that category.
That's gotta hurt.
;___;