I think that Adam looks at all this from a very different angle. Adam follows his own artistic star, and he draws a hard line, between the artist and their management. Over the years, he had to find out, to what extent artists are called out or are held responsible for stuff that is their management decision. He even sings about it in Heavy Fire.
Adam had to sell BTIKM and NCOE, when the songs dear to his heart were rather TSP and Shady and Cuckoo and PTL, none of which ever got a chance. He now talks openly that he was not allowed to tour during that era, but he never complained about it, at the time. He was holding his head down and did the promotion he was asked to do. None of this was his responsibility, but he and his career are getting held accountable for the results.
I think, he sees Demi's situation similar, as just a management decision, that she has to live by.
Do I think that Demi could have spoken up and said she wanted something different? Maybe? Maybe she actually likes NJ, and was caught in the middle, who knows, what she really wanted, ultimately she made a very US centric decision, and it is commercially safe and a well trodden path, in that what gets good ratings in the US spills successfully into a tour oversees later on. And if not, well the US is big enough that it does not break the bank. Boiler-plate roll-out model. Her challenge will be, to not let the fame monster and the money machine that made this decision, eat her alive. She has chosen this path, now she has to walk it. Artistically free, this path is not. Financially rewarding? Probably yes.
Adam, the artistic flower child, did not sell out, did not always do the commercially safe, chose a different path and tries to do what is commercially savvy, but does not compromise the artistic vision. The result is, that he is often not understood. Criticized for not writing the greatest hit, not taking on the biggest shows, not doing everything just for the sake of fame. He also zig-zags much more, just like all pioneers must. They cannot walk in a straight line, it is much more trial and error, exactly because their path is not well-trodden.
Different careers, each with their own challenges, and their own critics.
When it comes to that tour, Adam probably gave it up much more easily than his management did. For Adam, it was an idea, but not a necessity to do this tour, his management may have felt more pressure about that. Adam sees Demi as a peer, somebody who has that shared fate, that they get personally held responsible for managerial/business stuff, and so he protects her and probably will do so, as long as he sees his own fandom diss her on social media, because he can be stubborn that way. He probably has put that tour behind him, and especially, if he is now working with somebody to plan a US tour, as he has indicated, then I can totally see, how he has moved on, and treats this as a case of 'when one door closes, the Lord opens a window'. Maybe a promoter has stepped up for a US tour, who was not available 3 months back? We don't know that. What we do know, is that he is working on a US leg of the tour, that his overall TOH tour is world wide, and that he is doing alright.
I think, if he can let it roll off his back, we should be able to just let it roll off ours too, at least that is my opinion in that matter.