omg yes, I felt crazy the first time I experienced this "feature"
To me Gnome mostly feels like someone deliberately researched how to make desktop apps as intuitive as possible and implemented that as the policy. And I guess that's what they did, and they did a good job.
I have the opposite experience. I have no trouble navigating Gnome apps, and now when selecting an application for a task, I'll choose a Gnome or GTK4 one first. Other apps implement odd controls that don't mesh with the rest of the system.
Just today I had the disk usage analyzer (baobab) open and I was navigating inside directories so I want to go up a directory and clicked on the "<-" left arrow in the headerbar, which went "back" a screen, discarding all the work done scanning the filesystem.
If this app had a traditional menubar and a toolbar this wouldn't have happened.
This is a common type of experience I have every time I use a Gnome app. It almost feels like someone deliberately researched how to make desktop apps as counter-intuitive as possible and implemented that as the policy for some reason.