One has to concider how the anciet world viewed life and society.
Life was a constant struggle, they had fixed resources and depended on the family and their neighbours.
So a persistantly rebellious son was a real threat to the families welfare, as well as a threat to the community.
Note it says persistent glutton and drunkard, he’s wasting the family resources.
Note also it is mnote the family turning on an awkward difficult son, but the elders of the community.
Who would be aware of the persistant behaviour of this son.
Are you a father? Are you a mother?
How deeply hateful must your childs behaviour be before you bring him before a court that could order there execution?
Did it happen? There are no records I’m aware of in the bible.