I guess? I mean, if that's your stance then isn't cooking any food at all is a waste of time because of waiting on things to get hot and the ensuing clean up?
I can tell you that getting the oil hot takes all of ~2 minutes and it's not like I'm standing over top of the stove waiting for it to happen. Cleaning up takes about 30 seconds to wash the pot, the lid, and whatever bowl I used to hold the popcorn. If I ever find myself thinking, "Geez, I really wish I had that 3 or 4 minutes back" then I'd be trying to find out what's really going on in my life that is making me feel that way. I can tell you with certainty that it sure wouldn't be the 3 or 4 minutes it takes to cook the popcorn and then clean up a pot, it's lid, and a bowl afterwords.
My thing with air poppers is that the oil imparts a flavor that you obviously don't get otherwise and which I happen to prefer greatly to air popped popcorn.