I think it's pretty common for teenagers to reject the things that they were brought up with and to rebel against parenting styles etc. You will see this in hearing families also.
It doesn't mean that they will always stay or feel that way. Your feelings as a teenager often change particularly in your 20s and 30s. I know that mine did. When I was a teen I thought I knew everything but experiences just keep on changing you. Now when I see photos or videos of myself back at that age I see a different person to the one I am now.
I think the most important thing is to give people choices. If they want to turn off their CI then that is fine and they should be supported in that regard. If they want to reactivate the CI later in life because their circumstances and world view has changed then hey! they have that choice.
