the market picks 33% of winners so ratings are not required for that 33%
the other 67% is luck.
if ratings pick them it is probably by co-incidence rather than the ratings working.

other downsides to ratings are that they apply to every race and it is an astute punter that can pick the eyes out of ratings and win.

they may have the ability to pick false favorites which can lead to overlays which i think are required to win at racing.

the knowledge to be able to bet with confidence is the key.
if ratings can give this then by all means. i havent seen it yet.
good luck.

__________________
laurie