Technical documentation fails when it is written for the person who built the product instead of the person who has to use it.
The result is a manual that requires a call to support to interpret, an onboarding guide that loses users in the first paragraph, and a safety document that a field technician cannot follow under pressure with a machine that will not start.
The problem is not that the writers are careless. It is that the people with the deepest product knowledge, including engineers, developers, and technical leads, are trained to communicate with precision toward people who share their knowledge base, and most of their users do not share that base.
I close that gap by writing documentation where every term is accurate, every instruction is testable, and every step is written for the person who needs to get something done rather than the person who already knows how.