Why can't an address be created that you associate a password with like Bitcoin?
It's just a different approach.Either you have wallet.dat file with private keys which you must hold in dark cold place, affraid of viruses, bad blocks and your mom cleaning room early morning. Or you have just long passphrase associated - in your brain olny! - with some good old times when grass was greener and light was brighter... oh, nevermind
Both ways have some weak points, both required to understand things, both give you good ability to lost everything you have.
And I not even speak about thermorectal cryptoanalysis!
I see what you mean but even a random single or double digit being issued would be easy to remember and work round the security floor. Or username/pw like on blockchain.info.
If you look at blockchain info even with that security measure in place they've changed things (obviously out of a need as they've got bigger) so email & pw is no longer acceptable.