The influence experts built over decades is eroding. Most are looking in the wrong place to understand why.
There is a principle that sits at the heart of how power operates in any professional context. Where supply is scarce and demand is high, power concentrates in the hands of those who control the supply. Where supply expands or demand falls, that power disperses. It does not matter how good the supply is. The mechanics are indifferent to quality.
This is the third of the principles of power that has underpinned two decades of thinking and writing on how influence actually operates in organisations. It has always been true. What has changed is the speed and scale at which it is now playing out for expertise-based professionals.
What experts actually controlled
For most of their careers, senior professionals did not simply hold knowledge. They controlled access to it. The financial specialist, the legal adviser, the technical authority, each occupied a position where the knowledge their dependants needed was scarce and the cost of acquiring it independently was high. That scarcity was the source of their power and influence, their pricing, their indispensability, and in many cases their identity.
The knowledge itself was never the asset. The control of its supply was.
That distinction did not matter when the two things were effectively the same. Holding deep expertise and controlling access to it were inseparable. The expert who knew more than those around them was, by definition, the gatekeeper. The gap between what they knew and what others could access without them was where their authority lived.
What has changed
AI has not replicated the expert. It has democratised access to a sufficient approximation of what the expert holds. That is a different and more consequential disruption.
The people who once depended on the expert now have access to something that closes enough of the distance to change their behaviour. They can generate credible analysis. They can construct informed challenges. They can arrive at conclusions that previously required the expert’s involvement. The supply that the expert once controlled is no longer scarce. And where supply is no longer scarce, the power that scarcity generated disperses regardless of how good the original supply remains.
The mechanics of power do not distinguish between the two.
The myopia that makes it worse
The expert who is watching their influence decline will almost always diagnose it as a knowledge problem. They are not staying current enough. Their understanding of a specific area needs refreshing. A particular gap has been exposed and needs patching.
This diagnosis feels correct because it is the only one available from inside the frame the expert is using. The frame says expertise equals authority. Update the expertise, restore the authority. It is a coherent response to a problem the frame can see.
But the frame itself is the problem. The authority is not eroding because the knowledge is insufficient. It is eroding because the supply dynamic has changed in a way that no amount of knowledge updating can reverse. Patching exposed areas does not restore supply control. It addresses symptoms while the structural condition continues operating beneath them.
The expert who cannot see this link, between the erosion of their influence and the collapse of the supply control their position depended on, is not in a position to do anything other than manage the visible symptoms. The structural problem remains invisible precisely because the diagnostic lens they are using cannot bring it into focus.
What restores genuine authority
The supply control that relative expertise once provided is not coming back. The democratisation of access to sufficient approximations of expert knowledge is structural and accelerating. Attempting to restore the old dynamic by going deeper into existing expertise is not a strategy. It is a more effortful version of the same position.
What the current moment requires is a different relationship with a field entirely. Not knowing more than those around them in the conventional sense. Complete command of the full terrain, held at a depth and breadth that no AI-assisted approximation can reach, and that produces the kind of original thinking and genuine judgement that restores indispensability on entirely different terms.
That is what domain mastery provides. And why the professionals who are thinking seriously about their career strategy are finding it the most consequential repositioning available to them right now.
See also: Domain Mastery: The New Standard for Expertise
Colin Gautrey, May 2026
Colin Gautrey works privately with senior professionals determined to remain relevant and valued.