No, of course not. This question is logically and morally indistinguishable from that which asks whether those who advocated the abolition of human slavery cared less about the well-being of southerners who faced economic ruin if slavery were abolished than they did about the slaves.
The issue is not whom we care about or value most; the question is whether it is morally justifiable to treat sentient beings–human or non-human–as commodities or exclusively as means to the ends of others. For example, we generally do not think that we should use any humans as unconsenting subjects in biomedical experiments, even though we would get much better data about human illness if we used humans rather than animals in experiments. After all, the application to the human context of data from animal experiments–assuming that the animal data are relevant at all–requires often difficult and always imprecise extrapolation. We could avoid these difficulties by using humans, which would eliminate the need for extrapolation. But we do not do so because even though we may disagree about many moral issues, most of us are in agreement that the use of humans as unwilling experimental subjects is ruled out as an option from the beginning. No one suggests that we care more about those we are unwilling to use as experimental subjects than we do about the others who would benefit from that use.