Both my DC love Friends, and watch it over and over. They both cried.
I think it's perfectly normal to be a bit upset when a well-known person dies. For someone on TV etc, you 'invite' them into your living room. You know a bit about their lives. You may have seen them interviewed. You feel like you know them somewhat.
I think Freddie Mercury got to me most, because he was too young and so insanely talented. I was very sad about the death of the Queen, because she seemed destined to go on forever, because of her lifelong dedication to her role, because she had always been there. Though I shed buckets of tears watching Prince Philip's funeral, from the minute I saw his naval cap on top of the coffin, and because the wee Queen was so isolated yet so dignified in her grief.
I think you would have to have a heart of stone not to have at least a twang when you hear of the death of anyone you know of.
I had a work colleague whose grandson died at 5 months old, cot death. That was really sad. Grandad was an avid photographer and kept showing anyone who would look his photos of the little boy.
An older boy at school whom I only knew to see, was killed under the wheels of a double decker bus when pupils were pushing to get on. I will never forget the atmosphere in school after it happened.
A work colleague recently married, mixed marriage, Belfast in the 80s, was shot dead in her bed. That was horrific, stuff of nightmares.
I lost both parents inside a few months.
Just a few examples really. All different levels of personal involvement, loss and grief, yet a certain amount of empathy underpinning them all.