Absolutely no harm. Below 1200rvr airports equipped prepare themselves to execute cat approaches. If you are saying its cat2 the visibility must be between 1600 and 1200 which in a real world you WILL see the runway before landing and see the rccl and tdzl before minimums.
In my airline we prepare to the toughest conditions when we do lvp. Why? Because if conditions get better we dont care but if they get worse we are ready. That is the same reason cat2 does not need to be autoland