Meritocracy tends to confuse a very practical sense of merit with a more abstract and moral one. An individual may deserve a high-paying job or admission to a selective college because they are productive or qualified. However, in a moral sense, individuals do not merit the skills and abilities they are born with, nor do they merit the environments they were born into that allowed them to develop those skills.
STEM often (at the undergraduate level) teaches a certain type of thinking, which is a very effective and practical way to solve problems. STEM fields seek answers, while the humanities focus first on training students to ask the correct questions, and to take an extremely broad view of any problem. A lot of damage has been done by narrow, practical solutions. The technology we have is an engineering marvel, and the economic abundance we possess is a tribute to the efficiency of solving practical problems. And yet for all our abundance we still have massive poverty and environmental degradation, as well as a society that is becoming increasingly polarized, distrustful, and distant.