Just so this is totally clear:

The #1 advantage that the Adventurer profession has in pvp is it's damage shield.

and again:
The #1 advantage that the Adventurer profession has in pvp is it's damage shield.

That said, at low levels, there really isn't much of a reason to max Matter Creation. It's pretty costly in an IP expensive time of the game. At high levels, you'd be very remiss to not have this maxed up.