Plenty of people in the North shared "aghastness" when school girl Holly Newton was stabbed to death in Hexham in January.
"Hexham stabbings: Boy, 16, charged with murdering teenage girl"
https://www.bbc.co.uk/news/uk-england-64445537
Do you think the people of Croyden were sharing their "aghastness" at Holly's death at the time?
Or would they have been more preoccupied by local events?
https://insidecroydon.com/2023/01/
"It feels like Dog bites Man vs Man bites Dog. Boy kills girl? Sad but it happens. Boy kills famous tree? End of days."
No, it feels like you are expecting everyone across the UK to be focussed on a particular murder in the London area when there are stabbings and young people being killed all over the UK with horrifying regularity.
"99 young people aged under 25 were murdered with a knife or sharp object in the 12 months to March 2022. 13 were aged under 16."
https://benkinsella.org.uk/knife-crime-statistics/
In 2021, 30 teenagers were killed, most of them with knives, in London alone.
"London teen homicides: How killings broke 2008 record"
https://www.bbc.co.uk/news/uk-england-london-59239893
Did you share "aghastness" at each of those killings?
The felling of the Sycamore Gap tree is going to be experienced with shock and loss by many people in the North. You obviously don't understand why and that is OK.
However, I would bet my bottom dollar that more of them are also shocked by the death of Elianne Andam than those living in the South were even aware of the death of Holly Newton, or of the deaths of the many children and young people killed in the London area.