I'm in favor of that, but my education
has included plenty of powerpoint education. For context, I'm 25 and attended a typical Canadian high school and community college. We had units on presenting material in every english, social studies and "life skills" class in several different years in high school. Usually the classes included all the guidelines for delivering a high quality, useful presentation.
Same in college - we had a whole class one semester dedicated to learning how to present material effectively using powerpoint. Even still, my classmates would insist on giving boring, monotone lectures with far too much info on each slide. It got better toward the end of that college course though.
My takeaway from all that is that public speaking and presenting are DIFFICULT skills, that require not just a couple weeks of instruction, but many years of intensive instruction over the course of a schooling career. People do get better at it, but it takes a lot of work to get them there. Blaming powerpoint or any other tool is a simplistic approach that doesn't help the problem.