That folks have opted to interact (or been manipulated into it if we're really honest) with modes of communication that are outside of 1st amendment protections

That folks have opted to interact (or been manipulated into it if we're really honest) with modes of communication that are outside of 1st amendment protections doesn't change either the spirit or the letter of the law. That would be like saying that if folks suddenly decided to communicate over transcontinental distances via morse code utilizing geophones and large explosions as the transmission mechanism so now the first amendment demands semtex should be broadly accessible to the public.