If Zion Williamson winds up a Knick, Stan Van Gundy will have to see it to believe it. In a candid interview about the Knicks’ 2021-22 downfall, the former Pelicans coach said he is always skeptical regarding hype surrounding stars “angling” to play for the Knicks. “It’s always a plan that all these free agents want to come there,” Van Gundy told The Post. “And their fans think everybody wants to come to New York to play. But what is the example of that to use — the high-profile free agents who have come there? A lot of New Yorkers think everyone has New York at the top of their list and the Knicks are picking and choosing. That’s not the way it’s been working the last 20-plus years.”