The So You Think You Can Dance judge, who serves as executive producer on the Fox singing contest, denied that the programme attempts to cover up competitors' sexuality and argued that viewers should focus on the talent above all else.
"To be frank, I didn't understand why we're talking about contestants being gay or not gay," he told Entertainment Weekly. "I don't go into my dentist and say, 'Are you gay?' I don't say to contestants on So You Think You Can Dance, 'Are you gay?'
"What does that have to do with singing talent? Maybe it does [matter] for Adam Levine, but not for me."
Lythgoe went on to ask whether it was necessary for openly-gay season eight runner-up Adam Lambert to come out on the show.
"He must have come out before being on Idol, he just didn't talk about it on Idol. And why should he?" Lythgoe stated.
"There's no reason why anybody that goes on television should start coming out with who they are, what they are, what their sexuality is, who they're going to vote for or what their religion is."
Levine recently claimed that he wouldn't be a good band frontman if people didn't believe that he was gay.
Watch Adam Lambert sing 'A Change Is Gonna Come' on the final of American Idol 2009 below: