Here's Heinz Stücke & his bike. You can see how he's had a second, higher bar welded to his bike for a more upright posture.
The solons on this list who have toured more than Mr. Stücke will point out how he's doing it wrong.
I do not know who Mr Stucke is, but I call it personal preference. I rarely tell someone that they are doing it wrong.
Yesterday on a ride out on a local bike path, I saw some guy out for a ride (not touring) and he had an extra high stem on his bike, and his handlebars were those chopper type bars that were popular in the 60s or 70s that were WAY up there. He was sitting so upright that he was almost leaning back a bit. I bet he can't ride far on that bike before his bum on the saddle starts to really hurt.