Many of us do rappel, north40, red beard, me etc... .....they're just saying you dont need to rappel to get down, it's less weight to not have a rappel rope, if you dont go so high it's a bother to setup and then have to wrap up a rappel rope, etc...
I always rappel because I use my rappel rope as my main tether. I have no 3rd tether or lineman belt on me.
Your idea is perfectly reasonable and therefore you should try it.
What you NEED for 2TC is very very minimal.... but when you add desire for functionality and comfort and organization... then you get more things attached.