What is BuildContext, and why does essentially every single widget's own build method actually genuinely require one as a required parameter?

BuildContext represents a specific given widget's own precise current location genuinely positioned somewhere within the overall widget tree, and it is required as a parameter within essentially every single widget's own build method because it lets that particular widget properly access useful genuinely important contextual information from its own surrounding ancestors, such as retrieving the current app wide Theme, looking up a specific ancestor Provider, or properly triggering navigation to an entirely new different screen, all of which genuinely and fundamentally depend on knowing exactly where that specific particular widget currently actually sits relative to the rest of the overall surrounding widget tree.

Widget build(BuildContext context) {
  final theme = Theme.of(context);
  return Text('Hello', style: theme.textTheme.bodyLarge);
}