That's not on you as an employee, that's on the security team for not implementing compensating controls/defence in depth.
Yes you have a responsibility to detect phishing emails, not writing down passwords, inserting USB's etc. But if something happens to you completely behind the scenes during your normal business, it's not on the employee.
Most places force you to rotate the password so I would not say it is a responsibility to not write it down.
I do it. It is like there is a fixed number of passwords per life you can remember or something.
I know some places have rules like “must have at least N characters different from previous passwords”. However, depending on the exact rule, people can come up with easy-to-remember workarounds: e.g. the “blah” bit is ”foo” in even months and “bar” in odd ones.
An attacker can only hack the paper with physical access to my office. But if they have that, they might as well install an physical keylogger.
You can also combine a written down fragment of the password with a remembered one.
... and there are lots of unrelated people with physical access to your office. Cleaning staff, building maintenance, HVAC technicians, printer service staff... and all of these may not have the same level of background checks as your company has.
And even if you hire all of these yourself (which makes sense at a certain scale), that still doesn't protect you against marketing inviting a camera crew and walking around everywhere in one of these typical "life at the office" short films for Linkedin. IT staff offices seem to be very popular for such films since they're usually the most personalized rooms with lots of nerd stuff on the walls and desks.
Besides: swiping a photo of a post-it leaves no evidence, whereas installing a physical keylogger certainly does.
this is mostly so they can pin it on you when it inevitably happens (rather than the management)
In the case of LastPass, they're holding data (which they shouldn't have been to be fair) that's INCREDIBLY attractive to everyone from script kiddies to nation state actors. When it comes to keeping out nation states the threat model can get kind of wild and difficult to engineer for while building what's ultimately a consumer facing product. However, in this particular case it's fairly obvious that bad IT policies lead to an issue and LastPass got burned.
I would be more forging of LastPass but letting employees do BYOD means you have to trust everyone that ever uses that computer including spouses and children. It's just really dumb.
I have to take security trainings twice a year that literally talk about the buck stopping at my digital hygiene and I better not fuck it up for The Company.
Companies have to understand breaches will happen, but preparing employees on how to spot attacks or understand when they've been breached is a huge component of their ability to repel or minimize attacks.