I agree with removing undergrad but not residency. The things I learned in undergrad are largely useless. However, residency is important because it allows freshly minted doctors to practice under some degree of supervision for the first 3-7 years of seeing patients. The gradual increase in autonomy during residency is important, and it's my main gripe with the PA system that makes no distinction between a PA fresh out of school and one that's been practicing for 30 years.