Virtually no one in tech seems interested in doing what Jobs suggested despite the level of success he delivered.

Telling an average developer to work backward from the customer will generally be met with a foul mood. Especially when that constraint suggests that the currently preferred technical ideology or tribe is no longer suitable.

The whole thing is one big ego trip most of the time.

A compounding factor is when requirements are filtered through B2B layers. At which point the end-user is not the customer and it turns into a game of telephone.

Apple sidesteps this issue with vertical integration.