Well, a jockey and trainer were rubbed out for 3 years previously, so the message was clear.
4 years seems appropriate in these circs.

I didn't think the penalty was fair in the first instance and I don't think so this time around either.

Unless they have video to prove the usage as they did in the last case, I remain dubious.

As to using an unidentified, unbanned substance, what a joke!
Identify it, make sure it's performance enhancing in the first place, then talk about it.

A lot of ill will and jealousy in racing. The incompetent alway crying foul of the successful.

Make no mistake, I'm not saying, nothing illegal ever happens, but many of these 'crimes' are piddling affairs, that make no difference to the race outcome.
I'd be more wary of the quality of the rides.