“Most OTD people didnt leave, they were pushed out. When you push someone out its not so easy to get them back”
I assume that the posters were talking about the Yeshiva/Chasidish world. I think in the modern orthodox world a lot of kids “drift” away. They go to secular college. Or, after college they work and live lives that are not so observant.. I think a some of them “come back” but i am not sure how strong their connection to Torah is when they do. I have posted about this in the past — take a look at the Modern Orthodox Survey from i think Summer 2017….it is very interesting (at least to me).