Why didn't Ryan Clark push back at Colin Kaepernick comparing the NFL to slavery during interview?

According to a report by Fox News… Colin Kaepernick doubled down on his NFL-slave trade comparison in a podcast interview with Ryan Clark, calling the NFL Combine a "meat market." complete report is on below link. Source: https://www.foxnews.com/outkick-sports/why-ryan-clark-not-push-back-colin-kaepernick-comparing-nfl-slavery-interview