The argument from GG is basically that Congress intimidates Big Tech into deplatforming viewpoints that the culturally dominant party (Democrats) disagree with. The OP references Rep Craig asking Zuckerberg if it's "right" to "allow" her republican colleague Rep Greene to post content on Facebook. The implication is that Rep Craig is heavily implying it's not right, and therefore, if Facebook wants to be on the "good side" of Rep Craig (the Democrats), it shouldn't host Rep Greene's content.

It should be fairly obvious why large companies want to be in the good graces of lawmakers. It's reasonable for Sundar Pichai or Mark Zuckerberg to think that angry lawmakers lead to more anti-trust lawsuits than happy lawmakers.

The problem is actually that both sides are angry at Big Tech, but for opposing reasons. The Democrats don't like that Republican content is the most popular on Facebook, and the Republicans don't like that Facebook doesn't deplatform Democrats engaging in the same or worse behavior as any deplatformed Republican.

Both of their concerns are understandable, and stem from the power of "deplatforming" – ever since the deplatforming of Alex Jones, this situation was inevitable. As soon as the platforms set a precedent for what's "bad," they created future obligations for themselves. Because they need to be consistent, right? So if you took down this "bad" thing, why not take down this other "bad" thing? Well, it turns out people have different definitions of "bad," and so that's where most of this vitriol originates.