In practice, those big firms are more tiptoeing around right wing then around left wing.

Also in practice, there is way bigger outcry over right wing reedits being banned then left wing reddits. Each time reddit banns a bunch of subs, there is discussion about right wings ones - including on HN. Nobody cares about left wing subs being banned, that discussion never appears.

For the record, I am fine with both left and right reddits being banned right now. But I have yet to see free speech advocates to fret about toxic leftist and feminist places being closed.