There is virtually zero chance that a doctor will lose their medical license for diverging from the from the usual clinical practice guidelines around statins. Check the state medical board disciplinary records.
But if they're employed by a health system and fail to follow company policy then yes, they could be fired.
Different countries are different, some are far more trigger happy about it like Canada. What you suggest as an alternative other than 'git gud' diet & exercise also changes it.
But if they're employed by a health system and fail to follow company policy then yes, they could be fired.