Erika Jayne is an intensely protective mother, and she has real concerns about her adult son.
He works as a police officer. She never knows when he might be in a fight for his life while trying to keep the city safe.
While statistics of course tell us that this is the safest time in decades to be a police officer, that does not invalidate Erika's feelings.
Eileen Davidson did not mean to imply that he might die or be killed -- she simply touched a nerve.
There are a lot of strong feelings about family members in Beverly Hills, folks.
As you can see, Erika considers the safety of her son to be off-limits.