No, sorry don't agree at all.

If you're backing a dog over say 511 metres and it misses the start only slightly from an inside draw, basically it's all over. Seen this scenario over many years. Also the difference is that dogs don't have jockeys so not only does your dog have to run true, but so do all the others. In essence bad luck can destroy any dog's chances and is almost unrecoverable in a short race.