Really Stupid Horse Betting Idea

Okay, I have literally no experience betting on horses beyond a few days back in the 80s going to the NJ Meadowlands to watch the harness racing so I could yell, "Hit'em!" as they came down the stretch.

So obviously, my full-proof horse-betting idea will 100% work.

Here it is:

Bet on every horse in the race. But you determine how much to bet on each horse by the odds the horse is running at. Someone who actually is good at math will be able to figure this out better than me, but say the favorite is at 2-1 and the long shot is at 55-1.

You determine the best +EV or EV neutral amount to bet on every horse, with the favorite being bet on with the most money, and the long shot being bet on with the least amount of money. and every horse in between being bet on the right amount that is determined by it's odds in the race, from 2nd favorite to 2nd long shot.

Like I said, I have no idea how to calculate this, but one of you poker nerds should be able to do it.

As an example, say you bet like this:

Horse 1. Odds: 2-1. You bet $100.
Horse 2. Odds: 3-1. You bet $X.
.
.
.
Horse 9. Odds: 60-1. You bet $5.

There MUST be some sort of equation that would allow you to bet the right amount for each horse from favorite down to long shot, that would be the most +EV. Some equilibrium of bets from highest to smallest.

This will obviously work and will bust every parimutuel racetrack in the country. To be fair, I am high on a THC gummie right now, and it could just be nonsense.

What do you think?