If you lose the front brake pressure every time the front wheel is rotated one or two turns it is definitely a bent rotor. If the pressure stays up fine when the wheel is not rotated that is telling you the rotor is bent and pushing the pistons in when it wobbles and will take a couple of pumps to move them enough to regain brakes. I've seen a number of rotors on many different bikes straightened with a plastic mallet while checking runout with a dial indicator. It doesn't make them perfect but will make them usable with no problems. It doesn't take much to straighten them.
I experienced a mech hold a sharpie in his hand while wrapping his hand around the front fork, and spin the wheel, the sharpie marked the rotor where it was bent, then he smacked the rotor with a brass punch about 30 times in various locations. Made it better but I had to replace the rotors to get it back right. The rotors float on those metal donuts, and it doesn't take much to mess that little fragile system up. Welcome to the bleeding edge of motorcycling!