The problem, as I see it, is that we're no longer up against our friendly local bookie who was happy to adjust the odds for his 'friends' and 'slip' them on a newbie.
Now we're up against the corporates who have adopted the Woolworths/Coles/Aldi approach ..... now it's all about "turnover" with a "service charge". On Favourites (for example) you can expect this 'charge' to be 12%. They aren't betting you, they're charging you for their service.

Take a fairly standard race, 1200 - 1600, Fav. @ $2.50, WSR = 34.99% (sample 5,711 races) ....... but you need $2.85 just to break even (over time).

The corp. doesn't care which horse wins. To beat the 'odds' you have to do better than the considered opinion of all hands and the cook from those who use AI to those who use a pin to make their predictions .... and do it consistently. All the staking systems can do is slow the rate of your losses.
Have a nice day :-)