I'm not sure I agree with this. The reason I'd be more inclined to take a long-term prospect, at any position, over a guy whose returns will be immediate is that I think the Jets are going to struggle, with or without an impact player at #6. Why draft for 2017, when the team isn't going to be competitive anyway?
A team whose window was closing should draft an immediate impact player. If the Pats, for example, got an early pick for Garoppolo, they are in a win-now, mortgage the future mode. The Jets, though? Total opposite end of the spectrum.