The primary thing when you take a sword in your hands is your intention to cut the enemy, whatever the means. Whenever you parry, hit, spring, strike or touch the enemy’s cutting sword, you must cut the enemy in the same movement. It is essential to attain this. If you think only of hitting, springing, striking or touching the enemy, you will not be able actually to cut him.
The McNamara fallacy, named for Robert McNamara, the US Secretary of Defense from 1961 to 1968, involves making a decision based solely on quantitative observations (or metrics) and ignoring all others. The reason given is often that these other observations cannot be proven.
The fallacy refers to McNamara's belief as to what led the United States to defeat in the Vietnam War—specifically, his quantification of success in the war (e.g., in terms of enemy body count), ignoring other variables.
Domain specific UX means understanding how the supply should fit the demand considering a specific situation and use case.
On the other hand, many aspects of UX don’t require knowledge about a particular situation. They‘re based on the common constraints of human sense faculties, memory and cognition or the net of ergonomic factors around the device and the setting where it’s used. These domain independent elements of the UX are important too.
Domain independent UX should absolutely pervade the organization. It belongs to the general skill and knowledge of each supplier at their link in the chain. It’s part of learning to be a good designer, programmer, marketer, salesperson etc.