I think the key difference is Blanks was already accepted to Harvard to run before his gap year. Moreover, Blanks's gap year was due to COVID, when Ivies were not competing. Blanks smartly elected not to enroll to delay starting his Ivy 4-year clock. Had he enrolled, he would not have been able to compete. Blanks is not a good comparator but for the fact that it shows that someone can improve significantly during a 1-year time period in which they are not studying or racing.
Blanks knew he was going to Harvard the entire gap year. He did not have to convince any coach to recruit him after the gap year, which is what the OP must do. Given how coaches are creatures of habit, there may be some who are unwilling to think outside the box unless the OP's times are spectacular (or at least better than a contributing sophomore).
To the extent this guy is real - and there are reasons that may not be the case - I think the dilemma is an interesting one, but he should not use Blanks as a guide here. Apples to oranges.