There is merit in the idea that comedians, by nature of comedy involving a lot of trial and error, should have some leeway in saying things that may push against what's "acceptable," at least as long as they are also willing to either meet a wider audience half way and adapt around said audience or accept that their brand of comedy is only ever going to appeal to a small The movie pushing the point that "one clumsy joke" shouldn't be enough to ruin somebody's career is definitely on the right track.
That said, involving Gilbert Gottfried, somebody who got in trouble for something more than "one clumsy joke," makes me lean towards seeing this project come off like a bunch of people who are on their way to irrelevancy on their own doing and want to blame everybody else for general audiences not wanting that brand of humor anymore. Maybe they will be willing to do enough introspection to address their own failings in addressing the times changing, but I am admittedly doubtful.