Gartner's buyer surveys have tracked a steady rise in the share of B2B buyers who prefer a rep-free purchase experience, now past two thirds and still climbing year over year. Among younger buyers moving into decision-making roles, the preference is stronger still.
This is usually discussed as a sales problem. It is not. It is a content problem with sales consequences.
If a buyer will not take a discovery call, every question a sales engineer would have answered has to be answered by something you published. Most technology marketing organizations have not made that transfer, and the result is buyers who reach the shortlist stage with unresolved questions and quietly select the vendor whose documentation answered them.
What the rep was actually doing
Before rewriting anything, be specific about the job being replaced. In a typical technology evaluation, a sales engineer handles four things: confirming technical fit against the buyer's existing stack, quantifying implementation effort and timeline, surfacing and addressing objections the buyer has not articulated, and giving a credible account of where the product is weak.
The first two are straightforwardly documentable, and most vendors do them poorly. The third requires knowing your buyers well enough to anticipate objections. The fourth is the one almost nobody attempts, and it is the one that builds the most trust.