Yes. According to UCI rules women are not allowed to compete in the men's race. And women are not allowed to organize a race with the same length as the men. Even just for themselves.
Even though women compete in races like RAAM (Race Across America, ~5000km) and the Transcontinental Race (TCR, ~3500km) and have actually beaten the men at them. Those aren't UCI races because they wouldn't be allowed to join if they were.
RAAM is a pure endurance event, and it also tends to attract mostly older athletes. Not to take away from Leah's achievement, but it's a much different animal than a high speed road race. The men's fields are consistently much faster overall and in finishing speeds than women's fields in group races. Women in the US are still allowed to race a category lower in the men's fields and even then a win is incredibly rare for a woman in a men's field - and usually only happens at the category 4 level in men's racing with an exceptional category 3 woman.
You're citing amateur races with hobbyist athletes, not professional caliber ones. It's very disingenuous of you to pick these examples when objective measurable long distance data is abundant.
Even though women compete in races like RAAM (Race Across America, ~5000km) and the Transcontinental Race (TCR, ~3500km) and have actually beaten the men at them. Those aren't UCI races because they wouldn't be allowed to join if they were.