Let us enlightenment ourselves, What could be some causes of this?
Could it be stress, elaborate passwords or something else (please state what you think is a cause).
From identifying the causes, i believe we will be able to get solutions.
I've come across certain number of people who wants to be using a self generated default password for every of their wallets created in the process of not having to forget password but it's quite unfortunate that they can't do the same thing to phrases nor private key. Even though using just one password isn't safe as it exposes your whole life data from being hacked.
Causes
1. Creating wallet under the influence of alcohol or drugs.
2. Not having the right appropriate cloud app installed on mobile/PC to have your data saved like the interest of Google docs, colornote, Google drive to mention few.
3. Not being in a conducive area while creating wallet. Because at times, background noises easily distract one's attention.
4. Not understanding the exact files to stored (Newbie)
5. Marital issues. This sounds odd and also out of context but it's the truth though. I was once a victim; ike I mistakenly exposed my wallet worth of 2000$ plus while having some sort of arguments on Internet with my girlfriend back then in 2018.