Yep, there’s a reason 2FA recovery keys are usually printed and stored safely.
With that said, one way to avoid someone compromising service A due to somebody breaking into service B is to have different passwords everywhere, so a Password Manager is more convenient anyway.

For home Wi-Fi I use a strong password, but that’s because it’s something I input once in a blue moon. For guests I have a guest Wi-Fi with a simpler* (still reasonably secure and random, but shorter and without special characters) password and a QR code for simple use, though they are rate limited and have no access to any other network clients.