There are actually a lot of lemmings out there who will go with the perceived winner. That’s why winning states, and not just delegates, is so important to candidates. That’s also why poll numbers in State B will shift so quickly when someone wins State A.
You have an overly simplistic view on this. The delegate count matters and Supertuesday is a one shot that settles this. The lemmings are the MSM that think like you do. Polls do not shift as you suggest.