That might be an issue but cracking it at first is the big deal. I am not sure If Password Managers are a good option or not, my iPhone's Facecam does a really great job though.
The risk for you to get hack on all of your accounts is huge once one of the platform where you register got hack and the account details of their users will be taken by the hackers. Also some cases their are times that we will forget what password we set that's why I don't trust saving some important details by using memory only because anything could happen so I mostly I always written up my password on multiple 2 notebooks then lock it on my computer desk, so far I never get encounter any issues since I can say I'm safe by using this to any online hacking.