What is the disadvantage of studying classical mythology?

Most of what was taught as 'Classical

Mythology' used Roman gods and goddesses by name even when the myth

or lore behind the story was not Roman in origin. It rarely pins

down the origin of certain stories. It can also be limiting, as

Classical Mythology is only of the two regions of Rome and Greece

and does not portray other beliefs in that area and eras. A wider

study of Greek and Roman religion is better to use as a

understanding of their 'mythology'.