Yes that's all very good but are you touring on the Unbound Gravel race type of terrain? If you're doing an offroad tour, then by all means use a wide tire.
I'm touring in Bavaria now where the roads are great. Here a 40mm tire wouldn't be more comfortable than a 23mm tire. You can't get more comfortable if the pavement is already ice rink smooth. I'm using 35mm tires.
Of course in Bavaria a 40mm tire would be more comfortable than a 23mm tire. It would be more comfortable in all Germany, even without weight on the bike. 20 years back we used 23mm on road bikes, even on road bikes people use 28-30mm these days.
But if one wants to feel every single little pothole in his body 23mm sure is fine.