You're grasping at straws here. Are you genuinely trying to compare a private corporation to the sidewalk of a city/town? Cities/towns are registered private entities for organizational purposes, however in good faith and spirit they are owned indirectly by the citizens of that place. Private corporations like Google, Apple, are not the same - and to think a ruling from the 40s applies is interesting. Another point is you must become a registered user, which arguably removes you from the group of general public.

Besides that a ruling doesn't mean it's in the correct direction. Slavery used to be legal and abortion - a woman having choice - is trying to be made illegal again - as two examples. The general public distributing religious flyers on a sidewalk freely open to the public sounds like a reasonable ruling, that wouldn't allow a person to do the same thing say at a gated community though where the public is generally allowed access to - which could be considered akin to requiring users are registered.