Allowing a person to think for themselves is always the best option.
But allowing her to accept scientology should not be an option, and isn’t what I was suggesting.
I simply assume that OP, looking into scientology with a critical eye, is likely to have a good relationship with their daughter. And that the daughter being of dating age, and the offspring of someone seemingly reasonable, they are both capable of having an adult conversation. One that won’t end with their daughter going “fuck you, I’m cutting you out of my life forever” but rather with their daughter accepting reality and intergrating the facts into her mind in a way where they can’t be easily subverted.
If that isn’t the case, then the heavy handed approach is absolutely warranted.
Here’s hoping it’s crap off-road capabilities means it hits and gets stuck on the first bump.