I see what you are saying, but I think the impact of a post like this on something so intangible as "market sentiment" is extremely tenuous. It's hard to measure/quantify but I'd be shocked if it's more than a rounding error.

On the other hand, there are actual fundamentals like economy-wide inflation, employment numbers, GDP growth, supply/demand curves, etc., and it's important as an operator to have information about how the economy actually is, and more importantly how it's changing. I think the benefit of a post like this is much less tenuous; it provides insight into how the broader market conditions are panning out in our specific corner of the economy.

So yes, every measurement perturbs the system under measurement. In some cases that can be substantial. But in this case I don't think it is so.