True... but I believe that's allowable because the cables are necessarily running through public right-of-way, which the city government manages.
Cities do not (at this time) have the right to ban other methods of distributing television signals (i.e. roof antennas, satellite dishes). Congress prohibited this, some years ago, as being not in the public interest. The short version of what Congress enacted (and the FCC enforces) is, basically, the principal that if a citizen has "exclusive use" of some property, the citizen can use it to put up a TV mast and antenna, or a satellite dish, or a point-to-point digital television link... and any city or state law (or home-owner association covenant, or property rental or lease agreement) which says otherwise is overruled by the Federal law and regulations and cannot be enforced.