realistically those commentators or whatever its a part time job
secondly they are there to help gamblers, perhaps more so the novice bettor as most seasoned guys do their own thing
however if you know the horses , watch all the races and talk to trainers and drivers you should be able to help folks with a few decent winners most nights during your broadcast
the tbreds do a much better job of this
They are killing any novice bettors who listen and believe these people are helpful.
Imagine learning from an expert that it is too scary to single your best opinion in a p4, instead using 3 other horses on your ticket to be safe.
Or the best approach is to bet the chalk in every race
Or to approach the late double by figuring out a way to use all chalk and get 2/1 on your money.
This advice gives a novice zero percent chance to stick around and become a non novice cause their pockets will inevitably get destroyed which is not fun for them