You haven't read my previous posts and/or don't understand them. Such is the blindness of bias.
Any Syndicator, like any business, has products they pitch to different market segments. The informed customer chooses the product that suits their needs and/or aspirations. So for a start unless you were a fool you wouldn't buy a share in ALL the yearlings available. You'd buy shares in yearlings that match your budget, your pedigree preferences and your ownership goals.
So for example - a Stallion Making Syndicate (normally the highest priced yearlings) is aimed at a market that can afford the entry costs and who are probably the least risk averser purchaser. Many if not most have a bloodstock company and are utilising the tax breaks that come with that option. These customers KNOW that the odds of a yearling colt making a stallion prospect are slim. But they also know that the rewards when it happens can be very very substantial.
There is the other type of owner who looks to purchase into well bred fillies knowing that at the end of their racing career (whenever that may occur) they have some residual value. That is the can expect some of their initial purchase price back. If the filly happens to do very well then they will make a return on that investment.
Then there is the sophisticated owner who takes a share portfolio approach to buying yearling shares. They might purchase shares from as little as 2.5% in 5 or more horses. Some will mix and match the value of those horses e.g. 1 x a high priced well bred colt, 3 x moderately price well bred fillies and another that their partner likes the colour of. They've spread their risk. Of those 5 horses only one needs to perform exceptionally to improve the average ownership ROI of -75%.
I've met a group of owners that have selected very well and have 5% share in 20 horses - i.e. they are effectively owning one horse. Those owners haven't paid a training bill for a while and look set to get a positive return on their initial investment. That said they aren't doing it for the investment but for the fun and enjoying winning Group Races.
Now if you haven't ever had black type success then you would be advised to purchase a share in 5 horses with a Syndicator that has a 1 in 5 hit rate of winning black type from a particular sales draft.