Experienced road bike torers please chime in here. Many say I could do it, but wouldn't enjoy it.
The ultra light touring method does not have to use ay racks at all. Adventure Cycling sells a very large saddlebag and a bag that fits in the main tube (Revelate Designs). And there are probably handlebar bags available too. You can carry a fair amount of stuff without any racks at all. And its lighter not having heavy racks on the bike. You do have to be very minimal in your gear selection and watch the weight of all the gear closely. Some like this aspect, counting grams, others do not. But minimal gear and minimal weight are important for this touring to work. Minimal gear is most important of all. Its zero weight if you don't carry it. And you can then use any bike you want.
Would you enjoy it? Don't know. Some people do not enjoy vacations unless they stay in AAA hotels and have limousines drive them everywhere. Or only go in bus size RVs with Jacuzzi hot tubs. Others enjoy riding all over the world on an old K-Mart bike with milk crates to carry their gear. I expect you could look at your current lifestyle to determine whether you would like minimal touring. If you drive a 15 year old manual transmission compact car to work and the store and are happy, then you would probably do fine touring with minimal gear. If you must drive the half mile to the convenience store to get your fix of Twinkies using your $88,000 XLT AAA Super Mega SUV pick-up truck with the air conditioner turned on high, then the minimal touring method is probably not for you. I doubt riding a bike would even appeal to these types of people. If you don't use or need any luxury in your life now, and live barebones with nothing extra, you have enough, nothing extra, then minimal touring would probably work for you. If your house is stuffed full of stuff, if you buy stuff all the time, if you love shopping, then the minimal touring method probably won't work for you.