HGTV's new design orthodoxy

Why are the HGTV shows -Married to Real Estate/Christina on the Coast/Flip or Flop/Flipping El Moussas/ etc. now featuring:

fluting fluting fluting, especially wood accent walls

2 tone cabinets

black cabinets/walls/islands/appliances

curved upholstered white or beige furniture

huge pendant lights over massively long islands (or worse: dual islands!)

Main suites that are the size of an airport with tons of empty space

wallpaper (worst when on the ceiling)

cladding the vent hood in marble or faux marble

running up the counters up the walls instead of installing tiles