No one needs to give big tech permission to do anything. When it serves their interests they just shove it down peoples throats no questions asked.
The only reason we're having this discussion is because right wing lies generate revenue for them so they let it happen.
The only reason there even exists an argument that curbing the spread of dangerous lies is somehow an infringement upon people's "freedom of speech" is because its a convenient scapegoat for platforms to justify not doing something about it and for the bad actors to keep on doing it and face no repercussion.