Software security is not a super-goal. Acceptable risk levels vary with circumstances. If you browse wikipedia on a kiosk-style machine it doesn't really matter

Software security is not a super-goal. Acceptable risk levels vary with circumstances. If you browse wikipedia on a kiosk-style machine it doesn't really matter whether it's mining bitcoin or not. Or if you're visiting north korea then perhaps using your host's prescribed software stack may be preferable over bringing your own. Even logging into an account from an insecure machine can be acceptable if you're using a low-value account. Some people do use throwaways regularly.