Angela had an elemental affinity that was greatly higher than her cultivation level could handle, but since her talent matched it, her body was balanced and regulated the power until she was strong enough to fully use it.
However, for Adam, he couldn't upgrade his Dungeon Form, which represented his talent, past the floor of the dungeon he was on and so wouldn't be able to gain an elemental affinity past the floor of the dungeon he was on.
[It seems that once again the only solution is to hunt in the dungeon] thought Adam to himself as he sat on the sofa-like chair in the back of the van with his legs crossed and his eyes closed.
Angela could only use the elemental affinity according to her current cultivation level and wouldn't be able to use its full power without suffering backlash, but she could still do so in a life or death situation.