Are you forced to? No. Should you anyway? Yes. I did what @else said: just change them when you login. That way it doesn’t feel like a grand undertaking, and you still end up with extremely secure passwords that you don’t have to remember.
Also, i recommend generating your master password. If my senior mom staring down the barrel of alzheimers can remember a 12-digit string of random characters (after emptying out all the space wasted by a few dozen passwords), you can too