I think that's why women's racing is better included on the bill at what would have been men-only races, particularly where there are already mixed-ability races. Let the women develop in a bigger pool than currently exists, allow them to gain the racing and tactical skills that will make women-only races more interesting, and encourage the depth that will eventually result in better and bigger races at the newly-improved elite level.
In the meantime, if it's truly not sensible to allow elite women to race at the same time as elite men at major races, at least get women's races on the same bill so that they get exposure.