Say your wife is a well known Bitcoin billionaire.
And your wife bought something from my eBay store. Now I have your home address.
And if I am a ruthless character then I quietly break into your house one day with th3e objective of leaving no sign I was ever there. Search for written down passwords, take a photo, leave.
Okay, so assuming you get past this theoretical billionaire's physical security (at a minimum gated fences and an alarm system; if they're actually a billionaire, probably 24/7 armed private security as well) and into their mansion, how long do you think it would take you to search their 7 bedroom 10000 square foot mansion for these written down passwords which you have no information as to whether they even exist?
Of course its obvious there's many ways to get someone's address.
The point is that companies put vast effort into digital security but in many cases it's easily compromised by going to the home of the person that is the hacking target.
And your wife bought something from my eBay store. Now I have your home address.
And if I am a ruthless character then I quietly break into your house one day with th3e objective of leaving no sign I was ever there. Search for written down passwords, take a photo, leave.