Do you explain TLS to casual internet users? I'd like to see that.
The regular non-tech savvy user doesn't necessarily have to understand the details. That's why people are working on such solutions in the first place. Someone experienced with blockchains would never connect their wallet to a random stranger's and approve draining their funds. However the massive hype around them has brought in a lot of new users.
Wallets have come a long way from people writing their private key on a piece of paper back in the early days. The above complaint is bizarre in this context, because what they described is the exact opposite of what's actually happened. Every reputable wallet team has worked hard on improving security over the past years using strategies like social recovery, multi sig, cold storage of keys, etc.