> Hear me out: if the networks don't access a physically limited resource like the RF spectrum and there isn't any censorship issue at stake, if the issue is truly differential access and usage due to oligopolistic limitation, isn't it for the FTC to intervene and bust up throttling and content blocks under restraint of trade doctrine?

No, the FCC jurisdiction (even leaving aside broadband specifically) isn't predicated solely on a “physically limited resource”, otherwise it wouldn't have jurisdiction over telcos.

Further—while appeals have not been exhausted yet—AT&T v. FTC, if it holds up, will prevent any common carrier (e.g., any wireline telco) from being regulated in many activities by the FTC even in non-video-gaming activities (such as post-NN-repeal ISP services.)