Why not? The qualification being for public utility should be "is this basic infrastructure humans need to live now?". And the answer is yes. Facebook controls most of the big public speaking forums and google controls so much and in so many spaces that it would be foolish for me to even try listing.

I hope in america public utilities are not only controlled by the government. Because where I am from public utilities can be publicly or privately controlled. As long as they are all playing by the same rules many private companies have made lots of money providing public utilities.

I don't see the impediment here.