For anyone not aware, the excellent DaVinci Resolve has a free version which has built in Scene Cut Detection. Feed it a clip, run scene detection and then it can cut into subclips in a few seconds. From there, you can render out those subclips from a timeline as individual files.
I can't find a single other comment among so many emotional messages seeking solutions, for even one other semi professional or Pro tool.
Obviously the first names are BMD Black Magic Design for Resolve which now includes the Fairlight audio workstation for free. And AJA the other end of the budget spectrum, only cheaper than BMD if you have any kind of obligatory work flow or more than a weekend project. Color space transformation so you can watch on wide colour gamut panels in anything close to captured quality comes to mind for what you leave AJA to manage but need to research and invent a new work flow for if using BMD.