I'm not seeing your point tbh..if you are comparing like with like..same day races for instance..you can learn a lot and spot things others miss
i'm not advocating trying to do it at every course everday..more dip in when races coincide..and pick a couple out to back in future who have run well.."hidden" from many punters who only watch the race.
you are blanket dismissing something without using your imagination imo
you also suggest that horses have endless energy over the jumps and the tiring effect of pace doesn't affect them..which just isn't logical
its like saying human steeplechase runners are different from flat runners in that strong or weak early pace doesn't affect them..they just keep going regardless because they sometimes slow down between hurdles