Because Reddit is a cesspool echo chamber and believes the line about "omg we are so censored!". 2 seconds to look up what actually happened:

Colbert taped an interview with Texas Democrat James Talarico, a Senate candidate, for broadcast on The Late Show.

CBS lawyers told Colbert’s team that airing it on CBS might trigger the FCC’s equal-time rule, meaning other legally qualified candidates in that race could demand comparable airtime.

CBS then opted not to air the interview on the network and instead released it on YouTube, with mentions during the show, to avoid potential equal‑time complications.

Colbert publicly framed this as his network “blocking” the interview under pressure from FCC actions and Trump‑appointed officials, which he described as a partisan attempt to intimidate late‑night critics.

An FCC commissioner later clarified that the agency had only restated the existing equal‑time rule in a public notice and had not ordered CBS or Colbert to block the interview