"the fact that the program did not depict Pete Seeger "warts and all." "

I disagree, and I did not notice anyone else saying that.

They DID include some of the "warts" - such as his being a "visiting" father, his communist days, etc. Pete acknowledged this in the documentary, and he also talked about how he realized that Toshi did not get to pursue her own projects. They also interviewed one of the Peekskill protestors (Jim Brown had difficulty finding people who would speak on camera), and I think they did a very fair job.

Pete Seeger is not a saint, but his life was not the material of tabloids either. I'm not sure what other "warts" would be expected, but I think the documentary did a fair job of sharing the facts.