I don't understand what you mean. Do you think it's easy or hard to measure the value of a contributor in tech, and what does the "speculation" about their worth do exactly?
I think it's much easier to measure value of tech skills than most other skills. In the management and business areas you have to bet on how well people will perform and it's harder to put a finger on what will define success. Even people moving between similar environments might have difficulty adjusting. I personally believe that a lot of hiring is happening only on appearances alone. Since the people in middle management are often recruited like that, they also tend to overvalue skills of similar individuals. I'm seeing right now some "reassessments" happening due to the whole COVID thing. A lot of invaluable people are losing their jobs and yet no one is feeling any difference. It's just the market finally catching up to an overvalued good.