Again, this is a myth spread by people trying to tarnish Bitcoin Cash's image.
The truth is that the money can't be lost. If you have the Bitcoin Cash private keys for the deposit address, you have the Bitcoin Core private keys on the Core chain. All that happens is that someone accidentally receives Bitcoin Core instead of Cash.
A lot of newbies put everything on an online exchange and don't bother with handling private keys. I haven't found a single exchange yet where you control the private keys. The public keys on exchanges I've seen are different for Bitcoin Cash and Bitcoin. Also, can you imagine the end result of paying for a good or service that accepts Bitcoin with Bcash?
The truth is that the money can't be lost. If you have the Bitcoin Cash private keys for the deposit address, you have the Bitcoin Core private keys on the Core chain. All that happens is that someone accidentally receives Bitcoin Core instead of Cash.