Rotors bent very slightly but no rubbing. Is driving safe? I just bought Rockrider 520 with Tektro Auriga Comp hydraulic disk brakes on it. I didn't ride it yet.

Both brake rotors have a very slight bent and no rubbing. Just nearing both pads every round and braking power seems good. (For me as an unexperienced rider.)

I did a caliper alignment by loosening two bolts, brake hard and tightening. Before this there was slight rubbing every round.

Am I supposed to do something? Is this normal? Is driving safe?
A slightly warped or bent rotor may cause some brake pulsation. The rotor can be straightened with a Park tool DT-2 truing tool. I have had good luck using a large adjustable wrench. Close the jaws around rotor and gently bend the rotor. You most likely won't get it perfect but you can get it back to usable condition.