With popularity of kayaks, how come no company put a motor in it yet?

Here's one in action with a motor

Here's one in action with a motor

Isn't that the same kayak that Sonny/Sailfish has? Looks like a sweet little ride.

It apparently is the same as Sonny's!  http://www.norcalkayakanglers.com/index.php?topic=99650.0

Ran across this one from Dan at Headwaters 



Similar in spec https://jonnyboats.com/collections/boats/products/bass-100 and has a motor mount option you can buy!

Its almost all already  been said.  If you  want  to  turn your  kayak  into  a boat  its  up to  you.  If you  don't  enjoy  exercising  ( pedal  or paddle) and the relative quiet and vibration  free  environment and prefer to limit  the locations you  can  launch ( ie; Beach  launches /landings in marginal surf conditions) and concerns about  righting a flipped  kayak  with  a big battery  don't  worry  you (you  will  flip  if you  do more than a little  kayaking), then you  should  definitely  be a motor  guy.  Ultimately  just  have  fun. That's  what its  all about.