Mainstream economists have thought very different things at different times. The current mainstream orthodoxy is largely free market fundamentalists that took over in the 80's. There are heterodox economists that disagree with this view. Practically, there are also many examples of price and rent controls and de-commodification "working" throughout modern history and currently on other countries.
You argued that econlib cherry-picked economists to generate a biased result, which you then followed up by acknowledging that "mainstream" economists do not support price controls, which is exactly what the survey showed.
There is, in fact, a broad consensus among economists that price controls are generally counterproductive. The econlib survey showed it, the wikipedia links support that, and you apparently agree. So... thanks?
To illustrate this, consider the following hypothetical survey.
Survey:
"Is murdering babies wrong"?
End Survey
Essentially everyone will respond with a strong yes.
By your logic, if I don't include a dissenting opinion, the poll is necessarily biased.
Of course that's not correct.
The purpose of a poll is to understand the opinions of a population by understanding the opinions of a randomly selected sample of the population. If the population has strong opinions on a given topic, the survey will return lopsided results. That does not make the survey biased.
If however you seek out people with opinions to the contrary for the sake of including unpopular opinions, THAT DOES bias the survey, because the survey sample is then no longer randomly selected.