Genuinely sad to hear of the death of Terry Wogan. As my parents listened to radio 2 as I was growing up, it felt as if he was a part of the household - and then he morphed into a TV and broadcasting legend. I will remember him fondly as someone who exuded a rare sense of charm and gentle wit. I also respect the work he did for children in Need. Yes, great respect. However, I am not devastated, distraught, shocked, grief-stricken etc. For me those emotions belong with grieving people I actually know.
Perhaps the heart of this thread chimes with comments made elsewhere about people not actually knowing how to grieve.
I cannot make a judgement about how anyone else feels / felt in relation to Bowie or Wogan or any other person who has had a great deal of influence through the media. At the end of the day, it is personal, but as someone who has lost close family members, it just feels odd to hear such strong emotion being expressed about people who, for most of us, are not significantly connected.
One last thought - sometimes a more removed loss triggers other losses we have not dealt with. Sometimes we can be surprised by the emotion that is unlocked.