We've had some "Merckx style" time trial events around here that require a traditional drop bar road bike with no aero bars of any kind.
Maybe those events will gain traction. I hope they do -- for all the points you mentioned. And it's sort of like Zwift with pavement and air resistance, so it may be a natural extension for a growing pool of riders.
But I don't think you'll have much luck banning TT or Tri bikes. The Tri industry is too big; too many people have worked too hard creating a market to sell $14,000 bikes and $600 rear derailleur pulleys.