A stone and a peel can be used to move or remove the pie from the oven.
Most home ovens cannot achieve the temperatures required.
Hence “pizza oven”. The stone just doesn’t cut it (better on the rack in that case).
For those so inclined, beware: Anything but a high-end, properly ventilated pizza oven in the house will set off smoke detectors (mine’s outside and I use it year round).