The reason I start seeds on paper in a plastic take out container is because I know with certainty if the seed germinates. I have very limited space for peppers in January, and I don't want to waste room with 6-packs of soil that contain seeds that don't germinate. Also, a 6-pack that has fewer than six plants in it is a waste of space. I don't know what your germination success rate is, but very often the seeds I get in trades (or even my own seeds) have quite a bit less than 100%. When growing directly in soil you have to wait longer before you can be sure that the seed isn't going to make it and you have to start a new batch of seeds.
I can put about a half dozen small plastic containers on a dinner plate and keep them at a nice toasty temperature near the wood stove in my living room. I get a little aggravation from my wife for doing this, but she'd hit the roof if I tried to put a half dozen 6-packs near the stove.
The procedure I posted above is quick and easy and I don't have screw ups. Also, there isn't much gardening I can do in January, so I don't mind playing around with transplanting from the paper towel to the soil. However, I do catch a lot of grief from my wife for spending so much time fussing over my little seedlings.