Of course, using a weak password is clearly a no but at one point I think you have to decide where safety ends and paranoia begins.
I use different passwords on all sites I use, I do have a system of trying to keep them quite memorable and at the same time not easy to guess if one of my accounts gets compromised but I always have the feeling that the more you try to keep it all secure the more you start to doubt everything. You will, of course, doubt your browser password manager the first (which is normal), then the password program manager you've installed as it might be vulnerable to some malware, then you will try writing them down but where to hide them so no visual visit of a friend can uncover them....And even with 2FA, you have to avoid the phone number as an option because of the sim swaps attack..and so on and on
To be since I'm more interested in having a bulletproof way to recover all my account in case I end up dead drunk at my laptop and share all my passwords on some forum or social network in some stupid challenge the beer ordered me to take.