A significant proportion of google hits on my site come from people looking to find out which is the dominant leg.
How people write and think about the dominant leg is fascinating. At one end, there’s a lot of “common sense” that is nonsense. Like the article summary on this website–your top google hit for “dominant leg.” At the other end, there’s recent scientific frameworks and data that are quite consistent with ideas that, for Feldenkrais practitioners, are as “common sense” as the idea that, in standing, one’s head is generally above one’s feet.
People’s “dominant leg” as the literature defines it is usually their right leg. It’s not related to left and right handedness. It’s also not their dominant leg for the reasons you think it is.