I never said it didn't matter. I'm not debating fairness. I said it (availability) wouldn't make a difference.
Considering first, that "make available" and "sell" are not synonymous, I'd offer, if pressed, the engines would only become available on a cost prohibitive, 'Lease with Terms' basis. Establishing that fact, while knowing the engines source, I'll speculate the odds of gaining a competitive edge are greater with the alternative platforms.
If Star/S&S had chosen to make available, via "lease only sealed engine" terms, Arana and Smith would not have had any opportunity to advance the platform. There probably wouldn't be as many packages out there either. With the Two Valve V-Twin and the Inline Four, the purchaser has development options.
Beating Harley/VHR is and always will be, A TALL ORDER. With no insult or offense intended to the other fine competitors, they are one of, if not the, most experienced, knowledgeable, tested and prepared team in the history of the class. Beating them, would likely not happen, with they're gear, that they don't want you to have.
Forcing the availability is realistically, not a path towards equality. It would only change the perception.