In your specific scenario it doesn't (I think!). However, if the host doesn't know what door the prize is behind then there is a 1/3 chance of picking the prize

In your specific scenario it doesn't (I think!). However, if the host doesn't know what door the prize is behind then there is a 1/3 chance of picking the prize and you instantly loosing because both other doors are goats and you must choose one.