Great Overarching Bodiless Celestials or those who were stronger in the Devata Realms would risk getting affected by secular karma if they entered mundane realms. If they were contaminated with secular karma, it would affect their cultivation base. Worst case scenario, their cultivation base would stop progressing completely. For this reason, regardless of how much these powerhouses care about their descendants in the mundane realms, they would not recklessly return to the mundane realms.