Doing it and claiming to have done it in a professional setting are quite different though. I am perfectly willing to believe that a lot of researchers use Sci-Hub (though from my experience they tend to use Researchgate more); I am certain that the number of people who would shout about doing it on the rooftops is nowhere near even a small minority.
What you say does not correspond to my personal experience. As a single data point, in my research group all twelve phd students and five postdocs use SciHub regularly. Some of the faculty don't know it even exists, others do.
