That is wrong. Undergraduate is more important for forming your

own network and has more impact to your future. For example, if you graduate from Harvad college, the chance of your children get into Harvard is much higher because the legacy acceptance rate is 40-50%. I also know Stanford and MIT have 5-year BS+Ms program. Harvard has 2+2 program: work 2 years after graduation then go to HBS for 2 years. That are many benefits for getting into top schools.