in addition to the options for losing keys mentioned by Biodom, there is always an unexpected hacking option. We can recall the story that happened a few months ago with Libbitcoin, where key generation was carried out with insufficient entropy, as a result of which the keys generated in this way were especially vulnerable to hackers. This way, you can be confident in the safety of your keys and still face the loss of your bitcoins. The probability of this is almost zero, but still not zero.
This is why addresses must be created on a computer which has no internet connectivity and printed on a printer that will never have internet access. Printer spooler buffers can be hacked.
Whats wrong with handwriting?
All possible leaking problems avoided and it should not be like a big deal writing a dozen of simple words down.
well, in this case you rely on additional wallet or ledger/trezor software, right?
@Who is John Galt?, I believe, gave an example of the real life case of such wallet software derping and getting itself hacked.
I read recently about one example of supposedly unhackable hadware (iron key or iron box?) getting hacked via a relatively simple method: they were able to reopen it for many tries (instead of just 10) and after 200 tril tries, they got the code. There were other cases. Normies and/or nocoiners cannot know what will or will not work in a long run.