Any random based bonus in fact is not random, it's has same output no matter which day/seed/map you are using. For example, "Add all abilities for random tower" will always give abilities to second tower, if there only 2 or 3 towers in map; tile placement do not changes between same map, but different seeds (DQs), some core / boss types never appears, ect.

There is even someone made table with all results about this in wiki (btw, small reminder that game redirect to wiki in main menu): https://infinitode-2.fandom.com/wiki/Bonuses#AllAbilitiesForRandomTower_2

So, it's can be abused too much (like abilities for tower), because outcome always determined, and at same time some outcomes never will be seen (like random core, it's always give same type Alpha/Delta/Zeta, but never Beta/Theta/XI)