Brilliant theories they all may be. Bur for me, the big problem is having to look into so many things.
Looking up undie colour, gear changes, the age of the horse and when it last raced in Black Type.
But they are relatively simple, however it must take ages watching every single race many times to pick out the ones that were 'unlucky', affected by being wide, looked like they were sleepy that day, jockey made a cock-up. Every horse, every race to see what adjustments need to be made from those runs to any start it has in the future - to adjust for it, or for when I'm looking to find excuses for a failed run.
And then to still lose from all that would be just another kick in the guts.