WIY
What you quote might be true from a non-frum Jew from birth who has no clue what they left behind. Because a child that went off the derech and left behind frum parents and siblings, frum friends and went off the derech not because he “went to” a better life but because he or she was running away from something hurtful and painful will not argue with you that the life they are now leading is “better”. They are not going to argue with you at all. If they ask you questions you better be able to answer them or you have no business talking with them at all. If you can’t answer their questions you are part of the problem not part of the solution.
What is waiting for them more than anything else is a goyish olam and frei olam with their welcoming arms held wide open for them to run into. While our arms are crossed in front of us and our doors are slammed shut in their faces.
EDITED