This is very common with as—as for me, etc.
(6) Like as, meaning in the character of, as being, etc.
"Nay, if your worship can accomplish that," answered Master Brackett, "I shall own you for a man of skill indeed!" —Hawthorne.
Wavering whether he should put his son to death for an unnatural monster.—Lamb.
(7) Concession, meaning although, considering that etc.
"For a fool," said the Lady of Lochleven, "thou hast counseled wisely."—Scott
By my faith, that is a very plump hand for a man of eighty-four!—Parton.
(8) Meaning notwithstanding, or in spite of.
But the Colonel, for all his title, had a forest of poor relations.—Holmes.
Still, for all slips of hers,
One of Eve's family.
—Hood.