Bro this is complete and utter bull security advice.
And the main reason why we all stuck here on nostr.
If you wanna entrust a kid the key to your house, the last thing you wanna do is lock it into a blackbox, tell 'im how important the key is that must never be lost, and you should never look directly at it either cause it melts in the sun.
No, what you do is to give em the key to the bikeshed or unimportant everyday use so they get a good grip on it and learn the pain of loosing a key as early as possible.
Cause that's how monkeys are trained.
Scaring people about lost keys and urging coolX wallet is how we ended up outsourcing our trust to subscriptions.
Point is, don't scare people, guide them to lose their keys and support through generation of new.
Best Advice ✌️