Let's review a bit of history:
From Dirt road: (his story):
As a young quarter-horse trainer in the mid-1970’s, he knowingly gave an illegal pain-killer to one of his horses at Los Alamitos and was suspended for a year.
"KNOWINGLY"
2000:
Morphine
[
www.bloodhorse.com]
2014: Thyroid
[
tuesdayshorse.wordpress.com]
[
tuesdayshorse.wordpress.com]
2019
[
www.drf.com]
2020 DEX
[
www.drf.com]
You need a license to drive a car
You need a license to fly a plane
You need a license to be an electrician, plumber etc.
You need a license to train a racehorse (I think...lol)
Some folks should not have certain licenses.
Draw your own conclusions