She probably thinks she could be something like taylor swift or some other popular western artist on her own but the fact that she doesn't realises is that she is a MANUFACTURED artist,
even before her career began she had been babysitted and spoonfed by her company and got massive amount of support. She is nothing like a self made artist, she doesn't have a experience or talent for that. Her company is responsible for more than 90% of her success.
If she moves to west leaving kpop/yg/korea to try her luck over there on her own, she will probably get some gigs in hollywood and with a bunch western artist in beginning due to initial hype but she will surely fade away and get forgotten over there in a year or two.