...but not at LSU.
If LSU were to start a Men's Soccer program, it would be a varsity sport before Power Lifting and Rugby.
Because it's NCAA sanctioned. Sand Volleyball will be NCAA sanctioned within the next two or three years. That's why it was made a varsity sport. Also, it's status as a designated "emerging sport" means that scholarships can be awarded.
The NCAA doesn't sanction Rugby and Power Lifting, so athletic scholarships are not available and so the athletic department has no use in making those varsity sports.