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WannaCry targeted hospitals, businesses and similar machines.
WannaCry targeted everything with SMB exposed, blindly.
Also, you should read more about security through obscurity, the fact that “no one will target you because you are a low-value target” is a false sense of security.
Don’t expose anything from your local network to the internet (unless you want multiple new sysadmins in your house). Try tailscale instead.