That's a good point about cities growing to encompass weather stations, and it would be a slow steady change. But like you said, that can be corrected for and I

That's a good point about cities growing to encompass weather stations, and it would be a slow steady change. But like you said, that can be corrected for and I presume you or the gp are not the first to have thought of it. So I still strongly disagree with the assertion that using this data is pseudoscience. Almost everything in science has to compensate measurements for known anomalies or biases.