"DO think" & "IS a good thing"
For these, I believe there is wide variation. In some thinking, one could see something like expert system capability, true reality tested insight, like for someone in their professional field. For some others, fantasy thinking, not truly connected to reality can be seen. Likewise, for "IS a good thing" can have wide variation, such as above. Such that in some cases, the definition of what good is has identifiable, statistical significance and meaning. In others , it can have a fantasy significance, dissociated from reality.

See how different these are:

"Some people do think it is a good thing to wash and cook food to prevent transmission of pathogens such as salmonella, cholera, norvovirus, rotovirus, and many other bacteria, viruses and worms."

"Some people do think that it is a good thing to believe what we are told on TV, radio, and in the newspapers." (fantasy)