As other forum members already pointed out, if that happened, it is likely that Bitcoin would end up in some kind of centralized exchange or centralized service, from where they could recover their lost funds with the help of authorities. As you know, blockchain transactions are irreversible, and they cannot be recovered once you send them and get blockchain confirmations.
When people tell their story to others, they should tell the whole story. This is not the first time we hearing incomplete stories. These stories makes people confused just like how you were confused.
I wish best for people as Bitcoin holders and wish that they will keep their bitcoins safe but their practice and carefullness decide. Many bitcoin lost by carelessness and not only lack of knowledge. I know lost bitcoins are gifts to everyone but I never wish anyone to lose their bitcoins.
They appear to ask for help to get their bitcoins back but it is too late, because Bitcoin transactions are irreversible.
https://en.bitcoin.it/wiki/Irreversible_TransactionsLost coins only make everyone else's coins worth slightly more. Think of it as a donation to everyone.