That's simply not how discourse works on a national scale. There are many things that can be given a platform but aren't because it'd be a waste of time. No one is afraid to give these things a platform, it's just pointless. Artificial platforming for the sake of having every imaginable view point with or without merit on the table would be a disaster.
No one is stopping people from having these opinions, speaking about them, or teaching those perspectives. Claiming that this is a cause of freedom of information and somehow making this analogous to Galileo (it's not, not even in the slightest) is absurdly silly.
If you are looking to defend rational discourse and freedom of thought, well, you're not doing that -- leveling out everything on a no-questions-asked baseline is ignorant and becomes borderline satire of unbiased rational thought at that point.