Couldn't disagree more. My personnel experience and those of others who have spent a lot more time with a lot more otd kids is that it's exactly what @henche said- the pain of staying seems to them to be greater then the pain of leaving.
People don't leave their culture family lifestyle etc... for taiiva. Slip up once a while maybe but not wholesale leaving and rejection
But why is there pain for staying, when there is only rules its very painful but Judaism is rules plus plus.
Our problem isn't only with OTD, ppl not staying. What's with the half OTD, the ones that have nothing in them but don't leave the community for community.