Since we’re wandering into philosophy…
I would argue that we’re not necessarily dominant, though we certainly think we are. In terms of predatory behaviors, there are many animals that could best us. In terms of masses, bugs have us outnumbered by billions. We are not the only animals that shape our environments, or build societies, or work together, nor even use tools. We may not even be alone in thinking we’re dominant - heck, I’ve never spoken to an orca but I’m fairly sure they would say that they, and not us, are the intelligent life on this planet, salmon hats not withstanding.
This by no mean means that I think that we should ascribe our intentions to another creature. We don’t grow up as horses so how could we possibly completely understand their culture (so to speak)? I don’t think we can think of it that way. We are limited by our lack of understanding of what truly makes them tick. So examining whether a horse wants to become pregnant or not, as an example, comes down to observation of behavior, but I don’t think that’s their limitation, but instead it’s ours. Since we can’t really talk to them, we have just rudimentary tools at our disposal.
And, having observed groups of humans for a long time, I question how many of us are really reasoning and how many are justifying their instincts by rationalizing them. We know that in advertising, people don’t make rational choices, no matter how much they claim to, but we’re highly emotion based, driven by base instincts that we cover up to seem “polite”. A rather crude business guy that I worked with called it “GL/GP” in that humans are truly interested in only two things, “Getting Laid” and “Getting Paid” and the latter was in service of the former.
I read the OP as a philosophical question, as an exploration of feeling. They felt uneasy, were considering that they might be projecting. Sometimes the best conversations come from those uneasy tugs on our consciences, even though we’re not quite sure where they come from.