The main reasons I would be against letting you remove the pet:
1) The lore and the skills are already made and put into the game, with rangers having pets.
2) If the ranger has 2 play options, I do not trust that they would keep up with PET balance correctly. Usually AI must be balanced to be slightly OP with PERFECT play, to make up for it never playing perfect.
However, if they did do this, and they did it by changing the pets controls for some extra skills, I would be happy with this solution too.
AS LONG AS THEY PROMISE TO BALANCE PETS CORRECTLY!!!!!!
Pretty sure they are not going to let you go pet-less though.