From the video

Josh Allen is the consensus quarterback one... He finished quarterback one in points per game in what, four out of the last five years? Leads all players in touchdowns scored... Josh Allen is now a third-round pick... if you're in a 14-teamer or a 16-teamer, and it's got a lot of flex spots where the demand for running back and wide receiver shifts, that opportunity cost is a lot more difficult to take on for a player like Allen.
STACKED’s take
Elite consistency but third-round cost makes him poor value in deep leagues.
Josh Allen is the consensus QB1 with exceptional historical consistency, finishing QB1 in points per game in 4 of the last 5 years and leading all players in touchdowns scored. However, he is now a third-round pick year-over-year, making him expensive relative to late-round QB alternatives. JJ Zachariason advises against spending up on Allen; the opportunity cost is too high in 14-16 team leagues with flex spots where the demand for running back and wide receiver shifts, making it more difficult to justify a premium QB pick when dual-threat QBs can be found late. In softer 10-team leagues where roster optimization is more critical, spending up on Allen makes more sense.
Josh AllenQB · BUFPlayer page — value, ADP, projections, and every insight