Explaining 0 conf transactions

Hi, I have a question how do you explain 0 conf on BCH to a family member that know about security of confirmation and trades crypto? I recently presented BCH to a him, he knows about crypto but he think that the BCH network could be dangerous to use cause of 0 conf, I tried to explain that 0 conf is there like for fast payments but the person can wait for confirmations, but he end up not really convinced, how can I explain it to it in a better way.

Explaining 0 conf transactions