I suspect that some of the ideas are just perceived to be unpopular, as opposed to be actually unpopular. People might like the idea but is afraid to say it out loud
1. capable of switching off preference falsification for a survey
2. introspectively active (and accurately so) over a long enough period to notice that they behave differentially in public and private contexts
3. interested in exposing this degree of candor for a survey, i.e. motivated to "show the researchers" (show themselves, really) their belly after collapsing across all the reasons they'd rather not.
Humans are primitive. Questionnaires have to be designed around that.