Opensource.com - https://opensource.com/article/18/3/behind-scenes-bitwarden
We’re human. We are inundated with technology and accounts day in and day out, and most people will choose a password that they can easily remember.
—Jonathan LeBlanc, formerly of PayPal
Having to remember passwords for web applications, email, banking, and more begat the password manager. And that begat such popular and proprietary services like LastPass and 1Password.