It is hard to say, it is implied that he was going to commit suicide if he went into the black hole, obviously at his distance he must have felt a lot of pressure but I don't know if it is to reach planetary levels.
Generally the black hole disk releases enough energy that it would enter the range of Zettatons but it's not like Omniman was absorbing all the energy from the disk.
Likewise, in the anime it mentions that it stopped a meteorite the size of Texas that would be Moon level, and there is information that Allen's planet was completely destroyed by Viltrumites
I know that too, but as I said, I'll let that slide this once. For reasons.
If pressed, I can simply bring up that one filler Saiyan woman in that DBZ flashback with the reddish hair, who had a knife in her mouth, and say it's allowed for Saiyan women to be redheads, because of her.(totally not grasping at straws there, using non-canon stuff.)