Well, if you compare a bard playing their class perfectly you must compare to a BLM who is playing their class perfectly, in which a BLM should always come out on top.
And then there are those random speed kill strats like T10, in which a BLM should always come out on Top.

I'd also say that Good melee can be outparsed by great BLMs. Being outparsed by a BLM doesn't mean the Melee is garbage, it just means the BLM was great.