Is Lara Flynn Boyle's downfall and current appearance considered part of the Poltergeist curse?

To give you a better idea:
https://www.quora.com/What-might-have-caused-Lara-Flynn-Boyles-tragic-decline

https://www.nickiswift.com/89926/hollywood-wont-cast-lara-flynn-boyle-anymore/

https://www.tvovermind.com/whatever-happened-lara-flynn-boyle/