You know your racing days are over when you start making mistakes with the tractor. Note: A high-strung racebike can kill you; a low-strung Farm-all will kill you.
Q: Would campaigning a less fractious bike make up for slower reflexes?
A: Absolutely, just as soon as gravity and inertia increase their reaction time.
Q: Wouldn’t a horse be safer for both endeavors?
A: The horse has more brains* than you, and even the tractor, but he has no kill switch, so it’s a wash.
*If he is a mule, he has lots more.