Explain
Passwords in terms of a toothbrush
Having a single password for every account is the digital equivalent of using one communal toothbrush for the entire block of flats.
A robust password strategy is simply basic hygiene that far too many people refuse to practice. You need a long, unique string of gibberish for every single portal, much like how you would ideally possess your own bristles rather than sharing a crusty, damp object with Dave from 3B. If your Netflix, banking, and LinkedIn share the same tired credentials, you have essentially handed a spare key to your life to every bored stranger on the internet. It is not about changing them every few months, which is as pointless as scrubbing your teeth with a slice of ham; it is about using a password manager to generate a unique, unguessable sequence that lives safely in a vault.
Most people treat their login credentials like a hotel toothbrush, hoping the previous occupant did not do anything too distressing with it. Using a password manager is the technological version of buying your own high-end sonic brush and keeping it locked in a case. It generates a complex, impenetrable mess of symbols that keeps your data sparkling, while the "password123" brigade are currently running around with gingivitis of the soul. Stop sharing your digital toothbrush with the internet, or eventually, someone is going to use yours to scrub the grout in their own bathroom.
Where the analogy breaks downpasswords are not physically worn down by repeated use and do not technically accumulate germs.